diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a195c7b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,41 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
+/db/
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..0b135ed
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,47 @@
+plugins {
+    id 'java'
+    id 'application'
+}
+
+group 'com.example'
+version '1.0'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    // jackson
+    implementation 'com.fasterxml.jackson.core:jackson-databind:2.15.2'
+
+    // test
+    testImplementation 'org.junit.jupiter:junit-jupiter:5.11.3'
+    testImplementation 'org.assertj:assertj-core:3.26.3'
+    testImplementation 'org.mockito:mockito-core:4.11.0'
+}
+
+application {
+    mainClass = 'Main'
+}
+
+sourceSets {
+    main {
+        java {
+            srcDirs = ['src/main/java']
+        }
+    }
+    test {
+        java {
+            srcDirs = ['src/test/java']
+        }
+    }
+}
+
+tasks.test {
+    useJUnitPlatform()
+    testLogging {
+        events "passed", "skipped", "failed"
+        exceptionFormat "full"
+        showStandardStreams = true
+    }
+}
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..d64cd49
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..1af9e09
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..1aa94a4
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..6689b85
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/src/main/java/com/ll/wisesaying/App.java b/src/main/java/com/ll/wisesaying/App.java
new file mode 100644
index 0000000..09a5983
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/App.java
@@ -0,0 +1,36 @@
+package com.ll.wisesaying;
+
+import static com.ll.wisesaying.util.InputUtil.*;
+import static com.ll.wisesaying.util.OutputUtil.*;
+import static com.ll.wisesaying.util.Validator.*;
+
+import java.io.IOException;
+
+import com.ll.wisesaying.controller.WiseSayingController;
+import com.ll.wisesaying.exception.WiseSayingException;
+
+public class App {
+    private final WiseSayingController wiseSayingController;
+
+    public App(WiseSayingController wiseSayingController) {
+        this.wiseSayingController = wiseSayingController;
+    }
+
+    public void run() throws IOException {
+        printlnMessage(HEADER);
+
+        while (true) {
+            String cmd = inputMessage();
+
+            if (cmd.equals(END))
+                return;
+
+            try {
+                validateInput(cmd);
+                wiseSayingController.process(cmd);
+            } catch (WiseSayingException e) {
+                printError(e.getMessage());
+            }
+        }
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/Main.java b/src/main/java/com/ll/wisesaying/Main.java
new file mode 100644
index 0000000..52728e2
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/Main.java
@@ -0,0 +1,16 @@
+package com.ll.wisesaying;
+
+import java.io.IOException;
+
+import com.ll.wisesaying.controller.WiseSayingController;
+import com.ll.wisesaying.repository.WiseSayingRepository;
+import com.ll.wisesaying.service.WiseSayingService;
+
+public class Main {
+
+    public static void main(String[] args) throws IOException {
+        new App(
+            new WiseSayingController(new WiseSayingService(new WiseSayingRepository()))
+        ).run();
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/constant/Constant.java b/src/main/java/com/ll/wisesaying/constant/Constant.java
new file mode 100644
index 0000000..49f30f5
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/constant/Constant.java
@@ -0,0 +1,31 @@
+package com.ll.wisesaying.constant;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class Constant {
+
+    public static final ObjectMapper objectMapper = new ObjectMapper();
+    public static final String initIdx = "0";
+    public static final String SEPARATOR = " / ";
+    public static final String LEFT_BRACKET = "[";
+    public static final String RIGHT_BRACKET = "]";
+    public static final String TXT = ".txt";
+    public static final String JSON = ".json";
+    public static final String DB_FOLDER = "db/wiseSaying/";
+    public static final String LAST_ID_FILE = "lastId" + TXT;
+    public static final String ALL_FILE = "data" + JSON;
+    public static final int PAGE_SIZE = 5;
+    public static final int PAGE_NUM = 2;
+
+    public static Path getPath(int idx) {
+        String path = DB_FOLDER + idx + JSON;
+        return Paths.get(path);
+    }
+
+    public static Path getPath(String path) {
+        return Paths.get(path);
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/controller/WiseSayingController.java b/src/main/java/com/ll/wisesaying/controller/WiseSayingController.java
new file mode 100644
index 0000000..da9b09d
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/controller/WiseSayingController.java
@@ -0,0 +1,120 @@
+package com.ll.wisesaying.controller;
+
+import static com.ll.wisesaying.constant.Constant.*;
+import static com.ll.wisesaying.util.InputUtil.*;
+import static com.ll.wisesaying.util.OutputUtil.*;
+
+import java.io.IOException;
+import java.util.List;
+
+import com.ll.wisesaying.domain.Search;
+import com.ll.wisesaying.domain.WiseSaying;
+import com.ll.wisesaying.service.WiseSayingService;
+
+public class WiseSayingController {
+
+    private final WiseSayingService wiseSayingService;
+
+    public WiseSayingController(WiseSayingService wiseSayingService) {
+        this.wiseSayingService = wiseSayingService;
+    }
+
+    public void process(String cmd) throws IOException {
+        if (cmd.equals(ENROLL)) {
+            register();
+            return;
+        }
+
+        if (cmd.equals(LIST)) {
+            list();
+            return;
+        }
+
+        if (cmd.startsWith(DELETE)) {
+            delete(cmd);
+            return;
+        }
+
+        if (cmd.startsWith(EDIT)) {
+            edit(cmd);
+            return;
+        }
+
+        if (cmd.equals(BUILD)) {
+            build();
+            return;
+        }
+
+        if (!cmd.equals(LIST) && cmd.startsWith(LIST)) {
+            search(cmd);
+            return;
+        }
+    }
+
+    public void register() throws IOException {
+        printMessage(WISESAYING);
+        String content = inputMessage();
+
+        printMessage(AUTHOR);
+        String author = inputMessage();
+
+        WiseSaying wiseSaying = wiseSayingService.inputWiseSaying(content, author);
+        wiseSayingService.saveFile(wiseSaying);
+
+        printlnMessage(wiseSaying.getId() + ENROLLED);
+    }
+
+    public void list() {
+        printlnMessage(FORM);
+        printlnMessage(TABLE_SEPARATOR);
+
+        printWiseSayings(wiseSayingService.getWiseSayings());
+
+        printPage(1L);
+    }
+
+    public void delete(String cmd) throws IOException {
+        int idx = wiseSayingService.deleteWiseSaying(cmd);
+        wiseSayingService.deleteFile(idx);
+
+        printlnMessage(idx + DELETED);
+    }
+
+    public void edit(String cmd) throws IOException {
+        WiseSaying wiseSaying = wiseSayingService.getWiseSaying(cmd);
+
+        printlnMessage(EXISTING_WISESAYING + wiseSaying.getContent());
+        printMessage(WISESAYING);
+        String content = inputMessage();
+
+        printlnMessage(EXISTING_AUTHOR + wiseSaying.getAuthor());
+        printMessage(AUTHOR);
+        String author = inputMessage();
+
+        WiseSaying newWiseSaying = wiseSayingService.editWiseSaying(wiseSaying.getId(), content, author);
+        printlnMessage(WISESAYING + newWiseSaying.getContent());
+        printlnMessage(AUTHOR + newWiseSaying.getAuthor());
+
+        wiseSayingService.saveFile(newWiseSaying);
+    }
+
+    public void build() throws IOException {
+        wiseSayingService.buildPhrase();
+        printlnMessage(ALL_FILE + BUILDED);
+    }
+
+    public void search(String cmd) {
+        Search search = getSearch(cmd);
+
+        printListHeader(search);
+
+        List<WiseSaying> wiseSayings = wiseSayingService.getWiseSayings(search);
+
+        printlnMessage(FORM);
+        printlnMessage(TABLE_SEPARATOR);
+
+        printWiseSayings(wiseSayings);
+
+        printPage(search.page());
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/domain/Search.java b/src/main/java/com/ll/wisesaying/domain/Search.java
new file mode 100644
index 0000000..8429a67
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/domain/Search.java
@@ -0,0 +1,23 @@
+package com.ll.wisesaying.domain;
+
+public record Search(
+    String keywordType,
+    String keyword,
+    long page
+) {
+    public static Search of(String keyWordType, String keyword, long page) {
+        return new Search(keyWordType, keyword, page);
+    }
+
+    public static Search of(String keyWordType, String keyword) {
+        return new Search(keyWordType, keyword, 1L);
+    }
+
+    public static Search of(long page) {
+        return new Search(null, null, page);
+    }
+
+    public static Search of() {
+        return new Search(null, null, 1L);
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/domain/WiseSaying.java b/src/main/java/com/ll/wisesaying/domain/WiseSaying.java
new file mode 100644
index 0000000..4568352
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/domain/WiseSaying.java
@@ -0,0 +1,45 @@
+package com.ll.wisesaying.domain;
+
+public class WiseSaying implements Comparable<WiseSaying> {
+    private int id;
+    private String content;
+    private String author;
+
+    public WiseSaying() {
+    }
+
+    public WiseSaying(int id, String content, String author) {
+        this.id = id;
+        this.content = content;
+        this.author = author;
+    }
+
+    @Override
+    public int compareTo(WiseSaying o) {
+        return Integer.compare(o.id, this.id);
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/exception/IndexException.java b/src/main/java/com/ll/wisesaying/exception/IndexException.java
new file mode 100644
index 0000000..fa17930
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/exception/IndexException.java
@@ -0,0 +1,7 @@
+package com.ll.wisesaying.exception;
+
+public class IndexException extends WiseSayingException {
+    public IndexException(String message) {
+        super(message);
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/exception/InputException.java b/src/main/java/com/ll/wisesaying/exception/InputException.java
new file mode 100644
index 0000000..3081c2f
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/exception/InputException.java
@@ -0,0 +1,7 @@
+package com.ll.wisesaying.exception;
+
+public class InputException extends WiseSayingException {
+    public InputException(String message) {
+        super(message);
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/exception/NotFoundException.java b/src/main/java/com/ll/wisesaying/exception/NotFoundException.java
new file mode 100644
index 0000000..1671a99
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/exception/NotFoundException.java
@@ -0,0 +1,7 @@
+package com.ll.wisesaying.exception;
+
+public class NotFoundException extends RuntimeException {
+    public NotFoundException(String message) {
+        super(message);
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/exception/WiseSayingException.java b/src/main/java/com/ll/wisesaying/exception/WiseSayingException.java
new file mode 100644
index 0000000..91936a5
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/exception/WiseSayingException.java
@@ -0,0 +1,7 @@
+package com.ll.wisesaying.exception;
+
+public class WiseSayingException extends RuntimeException {
+    public WiseSayingException(String message) {
+        super(message);
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/repository/WiseSayingRepository.java b/src/main/java/com/ll/wisesaying/repository/WiseSayingRepository.java
new file mode 100644
index 0000000..4870104
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/repository/WiseSayingRepository.java
@@ -0,0 +1,134 @@
+package com.ll.wisesaying.repository;
+
+import static com.ll.wisesaying.constant.Constant.*;
+import static com.ll.wisesaying.util.InputUtil.*;
+import static com.ll.wisesaying.util.OutputUtil.*;
+import static java.util.stream.Collectors.*;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+
+import com.ll.wisesaying.domain.Search;
+import com.ll.wisesaying.domain.WiseSaying;
+import com.ll.wisesaying.exception.IndexException;
+import com.ll.wisesaying.exception.InputException;
+
+public class WiseSayingRepository {
+
+    public final Map<Integer, WiseSaying> db = new TreeMap<>(Comparator.reverseOrder());
+    private int idx;
+
+    public WiseSayingRepository() throws IOException {
+        init();
+    }
+
+    public void init() throws IOException {
+        checkFileState();
+        idx = getLastIdx();
+
+        for (int i = 1; i <= idx; i++) {
+            db.put(i, getWiseSaying(i));
+        }
+    }
+
+    private void checkFileState() throws IOException {
+        Path path = getPath(DB_FOLDER);
+        if (!Files.exists(path)) {
+            Files.createDirectories(path);
+        }
+
+        Path lastPath = getPath(DB_FOLDER + LAST_ID_FILE);
+        if (!Files.exists(lastPath)) {
+            Files.writeString(lastPath, initIdx);
+        }
+    }
+
+    public void saveAllWiseSayings(List<WiseSaying> wiseSayings) throws IOException {
+        String content = objectMapper.writeValueAsString(wiseSayings);
+        Files.writeString(getPath(DB_FOLDER + ALL_FILE), content);
+    }
+
+    public void saveWiseSaying(WiseSaying wiseSaying) throws IOException {
+        String content = objectMapper.writeValueAsString(wiseSaying);
+        Files.writeString(getPath(wiseSaying.getId()), content);
+    }
+
+    public WiseSaying getWiseSaying(int idx) throws IOException {
+        if (!Files.exists(getPath(idx))) {
+            throw new FileNotFoundException();
+        }
+
+        String json = Files.readString(getPath(idx));
+        return objectMapper.readValue(json, WiseSaying.class);
+    }
+
+    public int getLastIdx() throws IOException {
+        String lastId = Files.readString(getPath(DB_FOLDER + LAST_ID_FILE)).trim();
+        return lastId.isEmpty() ? 0 : Integer.parseInt(lastId);
+    }
+
+    public void saveLastIdx(int lastId) throws IOException {
+        Files.writeString(Paths.get(DB_FOLDER + LAST_ID_FILE), String.valueOf(lastId));
+    }
+
+    public int getNextIdx() {
+        return ++idx;
+    }
+
+    public int getIdx() {
+        return idx;
+    }
+
+    public Map<Integer, WiseSaying> getDB() {
+        return db;
+    }
+
+    public void containsWiseSaying(int idx) {
+        if (!db.containsKey(idx)) {
+            throw new IndexException(idx + IDX_NOT_EXIST);
+        }
+    }
+
+    public List<WiseSaying> findWiseSayings(Search search) {
+        List<WiseSaying> wiseSayings = null;
+
+        if(search.keywordType() == null && search.keyword() == null) {
+            wiseSayings = new ArrayList<>(db.values());
+
+            return getSubWiseSayings(wiseSayings, search.page());
+        }
+
+        if (search.keywordType().equals(ENG_CONTENT)) {
+            wiseSayings = db.values().stream()
+                .filter(wiseSaying -> wiseSaying.getContent().contains(search.keyword()))
+                .collect(toList());
+        }
+
+        if (search.keywordType().equals(ENG_AUTHOR)) {
+            wiseSayings = db.values().stream()
+                .filter(wiseSaying -> wiseSaying.getAuthor().contains(search.keyword()))
+                .collect(toList());
+        }
+
+        if (wiseSayings == null || wiseSayings.isEmpty()) {
+            throw new InputException(NOT_EXIST);
+        }
+
+        return getSubWiseSayings(wiseSayings, search.page());
+    }
+
+    public List<WiseSaying> getSubWiseSayings(List<WiseSaying> wiseSayings, long page) {
+        int start = (int) ((page - 1) * PAGE_SIZE);
+        int end = Math.min(start + PAGE_SIZE - 1, db.size() - 1);
+
+        return new ArrayList<>(wiseSayings).subList(start, end + 1);
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/service/WiseSayingService.java b/src/main/java/com/ll/wisesaying/service/WiseSayingService.java
new file mode 100644
index 0000000..7ae14e4
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/service/WiseSayingService.java
@@ -0,0 +1,76 @@
+package com.ll.wisesaying.service;
+
+import static com.ll.wisesaying.constant.Constant.*;
+import static com.ll.wisesaying.util.InputUtil.*;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.ll.wisesaying.domain.Search;
+import com.ll.wisesaying.domain.WiseSaying;
+import com.ll.wisesaying.repository.WiseSayingRepository;
+
+public class WiseSayingService {
+
+    private final WiseSayingRepository wiseSayingRepository;
+
+    public WiseSayingService(WiseSayingRepository wiseSayingRepository) {
+        this.wiseSayingRepository = wiseSayingRepository;
+    }
+
+    public WiseSaying inputWiseSaying(String content, String author) {
+        int idx = wiseSayingRepository.getNextIdx();
+
+        WiseSaying wiseSaying = new WiseSaying(idx, content, author);
+        wiseSayingRepository.getDB().put(idx, wiseSaying);
+
+        return wiseSaying;
+    }
+
+    public List<WiseSaying> getWiseSayings() {
+        return wiseSayingRepository.getSubWiseSayings(new ArrayList<>(wiseSayingRepository.getDB().values()), 1L);
+    }
+
+    public List<WiseSaying> getWiseSayings(Search search) {
+        return wiseSayingRepository.findWiseSayings(search);
+    }
+
+    public Integer deleteWiseSaying(String cmd) {
+        int idx = getCmdIdx(cmd);
+        wiseSayingRepository.containsWiseSaying(idx);
+
+        wiseSayingRepository.getDB().remove(idx);
+
+        return idx;
+    }
+
+    public WiseSaying editWiseSaying(int idx, String content, String author) {
+        WiseSaying newWiseSaying = new WiseSaying(idx, content, author);
+        wiseSayingRepository.getDB().put(idx, newWiseSaying);
+
+        return newWiseSaying;
+    }
+
+    public WiseSaying getWiseSaying(String cmd) {
+        int idx = getCmdIdx(cmd);
+        wiseSayingRepository.containsWiseSaying(idx);
+
+        return wiseSayingRepository.getDB().get(idx);
+    }
+
+    public void buildPhrase() throws IOException {
+        wiseSayingRepository.saveAllWiseSayings(new ArrayList<>(wiseSayingRepository.getDB().values()));
+    }
+
+    public void saveFile(WiseSaying wiseSaying) throws IOException {
+        wiseSayingRepository.saveWiseSaying(wiseSaying);
+        wiseSayingRepository.saveLastIdx(wiseSaying.getId());
+    }
+
+    public void deleteFile(int idx) throws IOException {
+        Files.delete(getPath(idx));
+        wiseSayingRepository.saveLastIdx(--idx);
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/util/InputUtil.java b/src/main/java/com/ll/wisesaying/util/InputUtil.java
new file mode 100644
index 0000000..43b4345
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/util/InputUtil.java
@@ -0,0 +1,73 @@
+package com.ll.wisesaying.util;
+
+import static com.ll.wisesaying.util.OutputUtil.*;
+import static com.ll.wisesaying.util.Validator.*;
+import static java.lang.Long.*;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+
+import com.ll.wisesaying.domain.Search;
+import com.ll.wisesaying.exception.InputException;
+
+public class InputUtil {
+    public static BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
+    public static final String END = "종료";
+    public static final String ENROLL = "등록";
+    public static final String LIST = "목록";
+    public static final String DELETE = "삭제";
+    public static final String EDIT = "수정";
+    public static final String BUILD = "빌드";
+    public static final String ENG_CONTENT = "content";
+    public static final String ENG_AUTHOR = "author";
+    public static final String CMD_SEPARATOR = "\\?|id|=";
+    public static final String SEARCH_SEPARATOR = "\\?|keywordType|&|keyword|page|=";
+
+    public static void resetBufferedReader() {
+        bf = new BufferedReader(new InputStreamReader(System.in));
+    }
+
+    public static String inputMessage() throws IOException {
+        return bf.readLine();
+    }
+
+    public static int getCmdIdx(String cmd) {
+        String[] tokens = getTokens(cmd, CMD_SEPARATOR);
+
+        validateCmd(tokens);
+
+        int idx = Integer.valueOf(tokens[tokens.length - 1]);
+        return idx;
+    }
+
+    public static Search getSearch(String cmd) {
+        String[] tokens = getTokens(cmd, SEARCH_SEPARATOR);
+
+        validateCmd(tokens);
+        validatePage(tokens);
+
+        if (tokens.length == 2) {
+            return Search.of(valueOf(tokens[1]));
+        }
+
+        if (tokens.length == 3) {
+            return Search.of(tokens[1], tokens[2]);
+        }
+
+        if (tokens.length == 4) {
+            return Search.of(tokens[1], tokens[2], valueOf(tokens[3]));
+        }
+
+        throw new InputException(ILLEGAL_CMD);
+    }
+
+    private static String[] getTokens(String cmd, String cmdSeparator) {
+        String[] tokens = cmd.split(cmdSeparator);
+        tokens = Arrays.stream(tokens)
+            .filter(token -> !token.isEmpty())
+            .toArray(String[]::new);
+        return tokens;
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/util/OutputUtil.java b/src/main/java/com/ll/wisesaying/util/OutputUtil.java
new file mode 100644
index 0000000..cbfa983
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/util/OutputUtil.java
@@ -0,0 +1,77 @@
+package com.ll.wisesaying.util;
+
+import static com.ll.wisesaying.constant.Constant.*;
+
+import java.util.List;
+
+import com.ll.wisesaying.domain.Search;
+import com.ll.wisesaying.domain.WiseSaying;
+
+public class OutputUtil {
+
+    public static final String HEADER = "== 명언 앱 ==";
+    public static final String FORM = "번호 / 작가 / 명언";
+    public static final String TABLE_SEPARATOR = "----------------------";
+    public static final String WISESAYING = "명언 : ";
+    public static final String EXISTING_WISESAYING = "명언(기존) : ";
+    public static final String AUTHOR = "작가 : ";
+    public static final String EXISTING_AUTHOR = "작가(기존) : ";
+    public static final String KEYWORD_TYPE = "검색타입 : ";
+    public static final String KEYWORD = "검색어 : ";
+    public static final String PAGE = "페이지 : ";
+    public static final String ENROLLED = "번 명언이 등록되었습니다.";
+    public static final String DELETED = "번 명언이 삭제되었습니다.";
+    public static final String BUILDED = "파일의 내용이 갱신되었습니다.";
+    public static final String IDX_NOT_EXIST = "번 명언은 존재하지 않습니다.";
+    public static final String NOT_EXIST = "해당 명언은 존재하지 않습니다.";
+    public static final String ILLEGAL_INPUT = "등록, 목록, 삭제, 수정, 빌드 중에 입력해주세요.";
+    public static final String ILLEGAL_CMD = "명령어 형식이 올바르지 않습니다.";
+
+    public static void printError(String message) {
+        System.out.println(message);
+    }
+
+    public static void printMessage(String message) {
+        System.out.print(message);
+    }
+
+    public static void printlnMessage(String message) {
+        System.out.println(message);
+    }
+
+    public static void printWiseSayings(List<WiseSaying> wiseSayings) {
+        wiseSayings.forEach((wiseSaying) -> {
+            System.out.println(wiseSaying.getId()
+                + SEPARATOR + wiseSaying.getContent()
+                + SEPARATOR + wiseSaying.getAuthor());
+        });
+    }
+
+    public static void printPage(long page) {
+        long previous = page % PAGE_NUM == 0 ? page - 1 : page;
+        long next = page % PAGE_NUM == 0 ? page : page + 1;
+
+        StringBuilder output = new StringBuilder();
+
+        if (page == previous) {
+            output.append(LEFT_BRACKET).append(previous).append(RIGHT_BRACKET).append(SEPARATOR).append(next);
+        } else {
+            output.append(previous).append(SEPARATOR).append(LEFT_BRACKET).append(next).append(RIGHT_BRACKET);
+        }
+
+        printlnMessage(PAGE + output);
+    }
+
+    public static void printListHeader(Search search) {
+        if (search.keywordType() == null && search.keyword() == null)
+            return;
+
+        printlnMessage(TABLE_SEPARATOR);
+        printMessage(KEYWORD_TYPE);
+        printlnMessage(search.keywordType());
+
+        printMessage(KEYWORD);
+        printlnMessage(search.keyword());
+        printlnMessage(TABLE_SEPARATOR);
+    }
+}
diff --git a/src/main/java/com/ll/wisesaying/util/Validator.java b/src/main/java/com/ll/wisesaying/util/Validator.java
new file mode 100644
index 0000000..5425f4f
--- /dev/null
+++ b/src/main/java/com/ll/wisesaying/util/Validator.java
@@ -0,0 +1,34 @@
+package com.ll.wisesaying.util;
+
+import static com.ll.wisesaying.util.InputUtil.*;
+import static com.ll.wisesaying.util.OutputUtil.*;
+
+import com.ll.wisesaying.exception.InputException;
+
+public class Validator {
+    public static void validateInput(String cmd) {
+        if (!(cmd.contains(ENROLL)
+            || cmd.contains(LIST)
+            || cmd.contains(DELETE)
+            || cmd.contains(EDIT)
+            || cmd.contains(BUILD))) {
+            throw new InputException(ILLEGAL_INPUT);
+        }
+    }
+
+    public static void validateCmd(String[] tokens) {
+        if (tokens.length <= 1) {
+            throw new InputException(ILLEGAL_CMD);
+        }
+    }
+
+    public static void validatePage(String[] tokens) {
+        if (tokens.length == 2 || tokens.length == 4) {
+            String lastToken = tokens[tokens.length - 1];
+            if (lastToken.chars().anyMatch(c -> !Character.isDigit(c))) {
+                throw new InputException(ILLEGAL_CMD);
+            }
+        }
+    }
+
+}
diff --git a/src/test/java/com/ll/wisesaying/controller/WiseSayingControllerTest.java b/src/test/java/com/ll/wisesaying/controller/WiseSayingControllerTest.java
new file mode 100644
index 0000000..d3679bd
--- /dev/null
+++ b/src/test/java/com/ll/wisesaying/controller/WiseSayingControllerTest.java
@@ -0,0 +1,138 @@
+package com.ll.wisesaying.controller;
+
+import com.ll.wisesaying.service.WiseSayingService;
+import com.ll.wisesaying.repository.WiseSayingRepository;
+import com.ll.wisesaying.util.InputUtil;
+import com.ll.wisesaying.util.TestUtil;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Comparator;
+
+import static com.ll.wisesaying.constant.Constant.*;
+import static com.ll.wisesaying.util.OutputUtil.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class WiseSayingControllerTest {
+
+    private WiseSayingRepository wiseSayingRepository;
+    private WiseSayingService wiseSayingService;
+    private WiseSayingController controller;
+    private ByteArrayOutputStream output;
+    private final Path path = Paths.get(DB_FOLDER);
+
+    @BeforeEach
+    void setup() throws IOException {
+        wiseSayingRepository = new WiseSayingRepository();
+        wiseSayingService = new WiseSayingService(wiseSayingRepository);
+        controller = new WiseSayingController(wiseSayingService);
+
+        output = TestUtil.setOutToByteArray();
+    }
+
+    @AfterEach
+    void cleanup() throws IOException {
+        Files.walk(path)
+            .sorted(Comparator.reverseOrder())
+            .map(Path::toFile)
+            .forEach(file -> {
+                if (!file.delete()) {
+                    System.err.println("파일 삭제 실패");
+                }
+            });
+        Files.deleteIfExists(path.getParent());
+
+        System.setIn(System.in);
+        TestUtil.clearSetOutToByteArray(output);
+    }
+
+    @Test
+    void registerTest() throws IOException {
+        // Given
+        String input = """
+                현재를 사랑하라.
+                작자미상
+                """;
+        System.setIn(TestUtil.getInputStream(input));
+        InputUtil.resetBufferedReader();
+
+        // When
+        controller.register();
+
+        // Then
+        Path savedFilePath = Path.of("db/wiseSaying/1.json");
+        assertThat(Files.exists(savedFilePath)).isTrue();
+
+        String savedContent = Files.readString(savedFilePath);
+        assertThat(savedContent).contains("현재를 사랑하라.", "작자미상");
+    }
+
+    @Test
+    void deleteTest() throws IOException {
+        // Given
+        controller.register();
+
+        // When
+        controller.delete("삭제?id=1");
+
+        // Then
+        Path savedFilePath = Path.of("db/wiseSaying/1.json");
+        assertThat(Files.exists(savedFilePath)).isFalse();
+    }
+
+    @Test
+    void editTest() throws IOException {
+        // Given
+        String input = """
+            현재를 사랑하라.
+            작자미상
+            수정된 명언
+            수정된 작가
+            """;
+        System.setIn(TestUtil.getInputStream(input));
+        InputUtil.resetBufferedReader();
+
+        controller.register();
+
+        // When
+        controller.edit("수정?id=1");
+
+        // Then
+        Path savedFilePath = Path.of("db/wiseSaying/1.json");
+        assertThat(Files.exists(savedFilePath)).isTrue();
+
+        String savedContent = Files.readString(savedFilePath);
+        assertThat(savedContent).contains("수정된 명언", "수정된 작가");
+    }
+
+    @Test
+    void buildTest() throws IOException {
+        // Given
+        String input = """
+                현재를 사랑하라.
+                작자미상
+                """;
+        System.setIn(TestUtil.getInputStream(input));
+        InputUtil.resetBufferedReader();
+
+        controller.register();
+
+        // When
+        controller.build();
+
+        // Then
+        Path allFilePath = Path.of("db/wiseSaying/data.json");
+        assertThat(Files.exists(allFilePath)).isTrue();
+
+        String allContent = Files.readString(allFilePath);
+        assertThat(allContent).contains("현재를 사랑하라.", "작자미상");
+    }
+}
diff --git a/src/test/java/com/ll/wisesaying/util/TestUtil.java b/src/test/java/com/ll/wisesaying/util/TestUtil.java
new file mode 100644
index 0000000..d0427b2
--- /dev/null
+++ b/src/test/java/com/ll/wisesaying/util/TestUtil.java
@@ -0,0 +1,25 @@
+package com.ll.wisesaying.util;
+
+import java.io.*;
+
+public class TestUtil {
+
+    public static ByteArrayInputStream getInputStream(String input) {
+        return new ByteArrayInputStream(input.getBytes());
+    }
+
+    public static ByteArrayOutputStream setOutToByteArray() {
+        ByteArrayOutputStream output = new ByteArrayOutputStream();
+        System.setOut(new PrintStream(output));
+        return output;
+    }
+
+    public static void clearSetOutToByteArray(ByteArrayOutputStream output) {
+        System.setOut(new PrintStream(new FileOutputStream(FileDescriptor.out)));
+        try {
+            output.close();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}