diff --git a/board/.gitattributes b/board/.gitattributes
new file mode 100644
index 0000000..8af972c
--- /dev/null
+++ b/board/.gitattributes
@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary
diff --git a/board/.gitignore b/board/.gitignore
new file mode 100644
index 0000000..7f4db33
--- /dev/null
+++ b/board/.gitignore
@@ -0,0 +1,38 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+/db/
diff --git a/board/build.gradle b/board/build.gradle
new file mode 100644
index 0000000..3d943b3
--- /dev/null
+++ b/board/build.gradle
@@ -0,0 +1,31 @@
+plugins {
+    id 'java'
+    id 'org.springframework.boot' version '3.4.1'
+    id 'io.spring.dependency-management' version '1.1.7'
+}
+
+group = 'com.programmers'
+version = '0.0.1-SNAPSHOT'
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(17)
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter'
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+
+    testImplementation("org.assertj:assertj-core:3.26.3")
+
+    implementation 'com.fasterxml.jackson.core:jackson-databind:2.12.4'}
+
+tasks.named('test') {
+    useJUnitPlatform()
+}
diff --git a/board/gradle/wrapper/gradle-wrapper.jar b/board/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..a4b76b9
Binary files /dev/null and b/board/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/board/gradle/wrapper/gradle-wrapper.properties b/board/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..e2847c8
--- /dev/null
+++ b/board/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/board/gradlew b/board/gradlew
new file mode 100644
index 0000000..f5feea6
--- /dev/null
+++ b/board/gradlew
@@ -0,0 +1,252 @@
+#!/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.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   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/platforms/jvm/plugins-application/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 -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || 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/board/gradlew.bat b/board/gradlew.bat
new file mode 100644
index 0000000..9d21a21
--- /dev/null
+++ b/board/gradlew.bat
@@ -0,0 +1,94 @@
+@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
+@rem SPDX-License-Identifier: Apache-2.0
+@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. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+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/board/settings.gradle b/board/settings.gradle
new file mode 100644
index 0000000..d0111f5
--- /dev/null
+++ b/board/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'devcourse'
diff --git a/board/src/main/java/com/programmers/devcourse/LectureApplication.java b/board/src/main/java/com/programmers/devcourse/LectureApplication.java
new file mode 100644
index 0000000..9cea226
--- /dev/null
+++ b/board/src/main/java/com/programmers/devcourse/LectureApplication.java
@@ -0,0 +1,18 @@
+package com.programmers.devcourse;
+
+import com.programmers.devcourse.controller.SayingController;
+import com.programmers.devcourse.view.InputView;
+import com.programmers.devcourse.view.JsonDBInputView;
+import com.programmers.devcourse.view.OutputView;
+
+import java.io.IOException;
+
+public class LectureApplication {
+    public static void main(String[] args) throws IOException {
+        InputView inputView = new InputView();
+        OutputView outputView = new OutputView();
+
+        SayingController sayingController = new SayingController(inputView, outputView);
+        sayingController.run();
+    }
+}
diff --git a/board/src/main/java/com/programmers/devcourse/controller/SayingCommander.java b/board/src/main/java/com/programmers/devcourse/controller/SayingCommander.java
new file mode 100644
index 0000000..21418f6
--- /dev/null
+++ b/board/src/main/java/com/programmers/devcourse/controller/SayingCommander.java
@@ -0,0 +1,66 @@
+package com.programmers.devcourse.controller;
+
+import com.programmers.devcourse.model.Board;
+import com.programmers.devcourse.model.CommandType;
+import com.programmers.devcourse.model.Saying;
+import com.programmers.devcourse.view.InputView;
+import com.programmers.devcourse.view.JsonDBOutputView;
+import com.programmers.devcourse.view.OutputView;
+
+import java.io.IOException;
+
+import static com.programmers.devcourse.model.CommandType.*;
+
+public class SayingCommander {
+    private final InputView inputView;
+    private final OutputView outputView;
+
+    public SayingCommander(InputView inputView, OutputView outputView) {
+        this.inputView = inputView;
+        this.outputView = outputView;
+    }
+
+    public boolean command(Board board) throws IOException {
+        String command = inputView.command();
+        CommandType commandType = CommandType.defineCommand(command);
+        if (commandType.equals(REGISTER)) {
+            Saying saying = inputView.inputSaying();
+            long boardNumber = board.add(saying);
+            outputView.printRegisterNumber(boardNumber);
+            return true;
+        } else if (commandType.equals(LIST)) {
+            outputView.printOptions();
+            outputView.printSayingInfo(board);
+            return true;
+        } else if (commandType.equals(REMOVE)) {
+            String id = command.substring(6);
+            if (!board.isExist(Long.valueOf(id))) {
+                outputView.printNotExistSayingNumber(id);
+                return true;
+            }
+            board.remove(Long.parseLong(id));
+            outputView.printRemove(id);
+            return true;
+        } else if (commandType.equals(MODIFY)) {
+            String id = command.substring(6);
+            if (!board.isExist(Long.valueOf(id))) {
+                outputView.printNotExistSayingNumber(id);
+                return true;
+            }
+            Saying element = board.getElement(Long.parseLong(id));
+            outputView.printOriginalSayingContent(element.getContents());
+            String newContent = inputView.inputNewContent();
+            outputView.printOriginalSayingAuthor(element.getAuthor());
+            String newAuthor = inputView.inputNewAuthor();
+            Saying modifySaying = element.modify(newAuthor, newContent);
+            board.modify(Long.parseLong(id), modifySaying);
+            return true;
+        } else if (commandType.equals(BUILD)) {
+            JsonDBOutputView.saveSaying(board);
+            outputView.printBuildSuccess();
+            JsonDBOutputView.lastSayingNumber(board.getLastBoarNumber());
+            return true;
+        }
+        return false;
+    }
+}
diff --git a/board/src/main/java/com/programmers/devcourse/controller/SayingController.java b/board/src/main/java/com/programmers/devcourse/controller/SayingController.java
new file mode 100644
index 0000000..b516859
--- /dev/null
+++ b/board/src/main/java/com/programmers/devcourse/controller/SayingController.java
@@ -0,0 +1,34 @@
+package com.programmers.devcourse.controller;
+
+import com.programmers.devcourse.model.Board;
+import com.programmers.devcourse.model.Saying;
+import com.programmers.devcourse.view.InputView;
+import com.programmers.devcourse.view.JsonDBInputView;
+import com.programmers.devcourse.view.OutputView;
+
+import java.io.IOException;
+import java.util.Map;
+
+public class SayingController {
+    private final InputView inputView;
+    private final OutputView outputView;
+
+    public SayingController(InputView inputView, OutputView outputView) {
+        this.inputView = inputView;
+        this.outputView = outputView;
+    }
+
+    public void run() throws IOException {
+        outputView.printInit();
+        Map<Long, Saying> savedSayingMap = JsonDBInputView.readSaying();
+        Long lastId = JsonDBInputView.readLastId();
+        SayingCommander sayingCommander = new SayingCommander(inputView, outputView);
+        Board board = new Board(savedSayingMap, lastId);
+        while (true) {
+            boolean isContinue = sayingCommander.command(board);
+            if (!isContinue) {
+                break;
+            }
+        }
+    }
+}
diff --git a/board/src/main/java/com/programmers/devcourse/model/Board.java b/board/src/main/java/com/programmers/devcourse/model/Board.java
new file mode 100644
index 0000000..a3e7f08
--- /dev/null
+++ b/board/src/main/java/com/programmers/devcourse/model/Board.java
@@ -0,0 +1,57 @@
+package com.programmers.devcourse.model;
+
+import java.util.*;
+
+public class Board {
+    private final Map<Long, Saying> element;
+    private Long idx = 1L;
+
+    public Board() {
+        this.element = new TreeMap<>(new Comparator<Long>() {
+            @Override
+            public int compare(Long o1, Long o2) {
+                return o2.compareTo(o1);
+            }
+        });
+    }
+
+    public Board(Map<Long,Saying>savedElements,Long lastIdx){
+        this.element = savedElements;
+        this.idx = lastIdx;
+    }
+
+    public long add(Saying saying) {
+        element.putIfAbsent(idx, saying);
+        return idx++;
+    }
+
+    public Map<Long, Saying> getElementsMap() {
+        return this.element;
+    }
+
+    public Saying getElement(Long id) {
+        return this.element.get(id);
+    }
+
+    public int getBoardSize() {
+        return element.size();
+    }
+    public Long getLastBoarNumber(){
+        return idx - 1;
+    }
+    public void remove(Long id) {
+        element.remove(id);
+    }
+
+    public boolean isExist(Long id) {
+        if (!element.containsKey(id)) {
+            return false;
+        }
+        return true;
+    }
+
+
+    public void modify(Long id, Saying saying) {
+        element.put(id, saying);
+    }
+}
diff --git a/board/src/main/java/com/programmers/devcourse/model/CommandType.java b/board/src/main/java/com/programmers/devcourse/model/CommandType.java
new file mode 100644
index 0000000..994e09b
--- /dev/null
+++ b/board/src/main/java/com/programmers/devcourse/model/CommandType.java
@@ -0,0 +1,20 @@
+package com.programmers.devcourse.model;
+
+public enum CommandType {
+    REGISTER,EXIT,LIST, MODIFY, BUILD, REMOVE;
+
+    public static CommandType defineCommand(String command) {
+        if (command.equals("등록")) {
+            return CommandType.REGISTER;
+        } else if (command.equals("목록")) {
+            return CommandType.LIST;
+        } else if (command.startsWith("삭제")) {
+            return CommandType.REMOVE;
+        } else if (command.startsWith("수정")) {
+            return CommandType.MODIFY;
+        }else if(command.equals("빌드")){
+            return CommandType.BUILD;
+        }
+        return CommandType.EXIT;
+    }
+}
diff --git a/board/src/main/java/com/programmers/devcourse/model/Saying.java b/board/src/main/java/com/programmers/devcourse/model/Saying.java
new file mode 100644
index 0000000..b02244a
--- /dev/null
+++ b/board/src/main/java/com/programmers/devcourse/model/Saying.java
@@ -0,0 +1,25 @@
+package com.programmers.devcourse.model;
+
+
+public class Saying {
+    private String author;
+    private String contents;
+    public String getAuthor() {
+        return author;
+    }
+
+    public String getContents() {
+        return contents;
+    }
+
+    public Saying(String author, String contents) {
+        this.author = author;
+        this.contents = contents;
+    }
+
+    public Saying modify(String newAuthor,String newContents){
+        this.author = newAuthor;
+        this.contents = newContents;
+        return this;
+    }
+}
diff --git a/board/src/main/java/com/programmers/devcourse/view/InputView.java b/board/src/main/java/com/programmers/devcourse/view/InputView.java
new file mode 100644
index 0000000..48202ad
--- /dev/null
+++ b/board/src/main/java/com/programmers/devcourse/view/InputView.java
@@ -0,0 +1,34 @@
+package com.programmers.devcourse.view;
+
+import com.programmers.devcourse.model.Saying;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class InputView {
+    private final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+    public String command() throws IOException {
+        System.out.print("명령) ");
+        return br.readLine();
+    }
+
+    public Saying inputSaying() throws IOException {
+        System.out.print("명언 : ");
+        String contents = br.readLine();
+        System.out.print("작가 : ");
+        String author = br.readLine();
+        return new Saying(author,contents);
+    }
+
+    public String inputNewContent() throws IOException {
+        System.out.print("명언 : ");
+        return br.readLine();
+    }
+
+    public String inputNewAuthor() throws IOException {
+        System.out.print("작가 : ");
+        return br.readLine();
+    }
+}
diff --git a/board/src/main/java/com/programmers/devcourse/view/JsonDBInputView.java b/board/src/main/java/com/programmers/devcourse/view/JsonDBInputView.java
new file mode 100644
index 0000000..8489909
--- /dev/null
+++ b/board/src/main/java/com/programmers/devcourse/view/JsonDBInputView.java
@@ -0,0 +1,65 @@
+package com.programmers.devcourse.view;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.programmers.devcourse.model.Saying;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+
+public class JsonDBInputView {
+    public static Map<Long, Saying> readSaying() throws IOException {
+        String directoryPath = "db/wiseSaying/";
+        File directory = new File(directoryPath);
+
+        File[] files = directory.listFiles((dir, name) -> name.endsWith(".json"));
+        Map<Long, Saying> sayingMap = new TreeMap<>(new Comparator<Long>() {
+            @Override
+            public int compare(Long o1, Long o2) {
+                return o2.compareTo(o1);
+            }
+        });
+
+        if (files != null) {
+            for (File file : files) {
+                ObjectMapper objectMapper = new ObjectMapper();
+
+                List<Map<String, Object>> rawMap = objectMapper.readValue(file, List.class);
+
+                for (Map<String, Object> stringObjectMap : rawMap) {
+                    String id = stringObjectMap.get("id").toString();
+                    String author = (String) stringObjectMap.get("author");
+                    String content = (String) stringObjectMap.get("content");
+
+                    Saying saying = new Saying(author, content);
+
+                    sayingMap.put(Long.parseLong(id), saying);
+                }
+            }
+        }
+        return sayingMap;
+    }
+
+    public static Long readLastId() throws IOException {
+        String directoryPath = "db/wiseSaying/lastId.txt";
+        File file = new File(directoryPath);
+
+        if (!file.exists()) {
+            return 1L;
+        }
+
+        try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
+            String line = reader.readLine(); // 파일에서 첫 번째 줄 읽기
+            if (line != null) {
+                return Long.parseLong(line.trim())+1; // 읽은 값을 Long으로 변환
+            } else {
+                throw new IOException("File is empty: " + directoryPath);
+            }
+        }
+    }
+}
diff --git a/board/src/main/java/com/programmers/devcourse/view/JsonDBOutputView.java b/board/src/main/java/com/programmers/devcourse/view/JsonDBOutputView.java
new file mode 100644
index 0000000..4b9560c
--- /dev/null
+++ b/board/src/main/java/com/programmers/devcourse/view/JsonDBOutputView.java
@@ -0,0 +1,65 @@
+package com.programmers.devcourse.view;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.programmers.devcourse.model.Board;
+import com.programmers.devcourse.model.Saying;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.*;
+
+public class JsonDBOutputView {
+    public static void saveSaying(Board board) throws IOException {
+        String folderPath = "db/wiseSaying/";
+        String filePath = folderPath + "data.json";
+
+        File directory = new File(folderPath);
+        if (!directory.exists()) {
+            boolean dirCreated = directory.mkdirs();
+            if (!dirCreated) {
+                throw new IOException("디렉토리 생성에 실패했습니다.");
+            }
+        }
+
+        LinkedList<Map<String, Object>> list = new LinkedList<>();
+        Map<Long, Saying> elementsMap = board.getElementsMap();
+
+        for (Map.Entry<Long, Saying> sayingEntry : elementsMap.entrySet()) {
+            HashMap<String, Object> map = new HashMap<>();
+            map.put("id", sayingEntry.getKey());
+            map.put("content", sayingEntry.getValue().getContents());
+            map.put("author", sayingEntry.getValue().getAuthor());
+            list.addLast(map);
+        }
+
+        ObjectMapper objectMapper = new ObjectMapper();
+        String json = objectMapper.writeValueAsString(list);
+
+        // 파일에 JSON 저장 (덮어쓰기 처리)
+        try (FileWriter fileWriter = new FileWriter(filePath, false)) {
+            fileWriter.write(json);
+            fileWriter.flush();
+        } catch (IOException e) {
+            throw new IOException("파일 저장 중 오류 발생: " + e.getMessage());
+        }
+    }
+
+    public static void lastSayingNumber(long lastSayingNumber) throws IOException {
+        String folderPath = "db/wiseSaying/";
+        String filePath = folderPath + "lastId.txt";
+        ObjectMapper objectMapper = new ObjectMapper();
+
+        File directory = new File(folderPath);
+        if (!directory.exists()) {
+            directory.mkdirs(); // 디렉토리 생성
+        }
+
+        String json = objectMapper.writeValueAsString(lastSayingNumber);
+
+        try (FileWriter fileWriter = new FileWriter(filePath)) {
+            fileWriter.write(json);
+            fileWriter.flush(); // 데이터 강제 저장
+        }
+    }
+}
diff --git a/board/src/main/java/com/programmers/devcourse/view/OutputView.java b/board/src/main/java/com/programmers/devcourse/view/OutputView.java
new file mode 100644
index 0000000..1cd395b
--- /dev/null
+++ b/board/src/main/java/com/programmers/devcourse/view/OutputView.java
@@ -0,0 +1,49 @@
+package com.programmers.devcourse.view;
+
+import com.programmers.devcourse.model.Board;
+import com.programmers.devcourse.model.Saying;
+
+import java.util.Map;
+
+public class OutputView {
+    public void printInit() {
+        System.out.println("== 명언 앱 ==");
+    }
+
+    public void printRegisterNumber(long registerNumber) {
+        System.out.println(registerNumber + "번 명언이 등록되었습니다.");
+    }
+
+    public void printOptions() {
+        System.out.println("번호 / 작가 / 명언");
+        System.out.println("----------------------");
+    }
+
+    public void printSayingInfo(Board board) {
+        Map<Long, Saying> element = board.getElementsMap();
+        for (Map.Entry<Long, Saying> entry : element.entrySet()) {
+            System.out.println(entry.getKey() + " " + "/" + " " + entry.getValue().getAuthor() + " " + "/" + " " + entry.getValue().getContents());
+        }
+    }
+
+    public void printRemove(String id) {
+        System.out.println(id + "번 명언이 삭제되었습니다.");
+    }
+
+    public void printNotExistSayingNumber(String id) {
+        System.out.println(id + "번 명언은 존재하지 않습니다.");
+    }
+
+    public void printOriginalSayingContent(String contents) {
+        System.out.println("명언(기존) : " + contents);
+    }
+
+    public void printOriginalSayingAuthor(String author) {
+        System.out.println("작가(기존) : " + author);
+
+    }
+
+    public void printBuildSuccess() {
+        System.out.println("data.json 파일의 내용이 갱신되었습니다.");
+    }
+}
diff --git a/board/src/main/resources/application.properties b/board/src/main/resources/application.properties
new file mode 100644
index 0000000..efe2ab5
--- /dev/null
+++ b/board/src/main/resources/application.properties
@@ -0,0 +1 @@
+spring.application.name=board
diff --git a/board/src/test/java/com/programmers/devcourse/lecture1/Lecture1ApplicationTest.java b/board/src/test/java/com/programmers/devcourse/lecture1/Lecture1ApplicationTest.java
new file mode 100644
index 0000000..6f4f80d
--- /dev/null
+++ b/board/src/test/java/com/programmers/devcourse/lecture1/Lecture1ApplicationTest.java
@@ -0,0 +1,36 @@
+package com.programmers.devcourse.lecture1;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+
+class Lecture1ApplicationTest {
+    private static ByteArrayOutputStream outputMessage;
+
+    @BeforeEach
+    void init() {
+        outputMessage = new ByteArrayOutputStream();
+        System.setOut(new PrintStream(outputMessage));
+    }
+
+    @AfterEach
+    void clear() {
+        System.setOut(System.out);
+    }
+
+    @DisplayName("종료명령어 입력시 종료테스트")
+    @Test
+    void commandExitTest() {
+        // given
+        // when
+        System.out.println("=====Logic Start=====");
+
+
+        System.out.println("=====Logic End=====");
+        // then
+    }
+}
\ No newline at end of file
diff --git a/board/src/test/java/com/programmers/devcourse/model/BoardTest.java b/board/src/test/java/com/programmers/devcourse/model/BoardTest.java
new file mode 100644
index 0000000..180afc5
--- /dev/null
+++ b/board/src/test/java/com/programmers/devcourse/model/BoardTest.java
@@ -0,0 +1,107 @@
+package com.programmers.devcourse.model;
+
+import org.junit.jupiter.api.Test;
+
+import static com.programmers.devcourse.model.CommandType.*;
+import static com.programmers.devcourse.model.CommandType.LIST;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertAll;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+class BoardTest {
+    @Test
+    void Board생성자Test() {
+        // given
+        Board board = new Board();
+
+        // when
+        System.out.println("=====Logic Start=====");
+
+        assertThat(board.getElementsMap()).isNotNull();
+
+        System.out.println("=====Logic End=====");
+        // then
+    }
+
+    @Test
+    void 명령정의Test() {
+        // given
+        Board board = new Board();
+
+        // when
+        System.out.println("=====Logic Start=====");
+
+        CommandType register = board.defineCommand("등록");
+        CommandType list = board.defineCommand("목록");
+        CommandType exception = board.defineCommand("예외");
+
+        System.out.println("=====Logic End=====");
+        // then
+        assertAll(() -> assertThat(register).isEqualTo(REGISTER),
+                () -> assertThat(list).isEqualTo(LIST),
+                () -> assertThat(exception).isEqualTo(EXIT));
+    }
+
+    @Test
+    void 게시판속명언추가테스트() {
+        // given
+        Board board = new Board();
+
+        // when
+        System.out.println("=====Logic Start=====");
+
+        long sayingNumber = board.add(new Saying("author", "content"));
+
+        System.out.println("=====Logic End=====");
+        // then
+        assertAll(() -> assertThat(board.getElementsMap().size()).isEqualTo(1),
+                () -> assertThat(sayingNumber).isEqualTo(1));
+
+    }
+
+    @Test
+    void 명언원소조회테스트() {
+        // given
+        Board board = new Board();
+
+        // when
+        System.out.println("=====Logic Start=====");
+
+        System.out.println("=====Logic End=====");
+        // then
+        assertThat(board.getElementsMap()).isNotNull();
+
+    }
+
+    @Test
+    void 게시판에_속한_명언의개수_조회() {
+        // given
+        Board board = new Board();
+        board.add(new Saying("a1", "c1"));
+        board.add(new Saying("a2", "c2"));
+        // when
+        System.out.println("=====Logic Start=====");
+
+        int boardSize = board.getBoardSize();
+
+        System.out.println("=====Logic End=====");
+        // then
+        assertThat(boardSize).isEqualTo(2);
+    }
+
+    @Test
+    void 삭제하기() {
+        // given
+        Board board = new Board();
+        board.add(new Saying("author", "content"));
+        board.add(new Saying("author2", "content2"));
+        // when
+        System.out.println("=====Logic Start=====");
+
+        board.remove(1L);
+
+        System.out.println("=====Logic End=====");
+        // then
+        assertThat(board.getBoardSize()).isEqualTo(1);
+    }
+}
\ No newline at end of file
diff --git a/board/src/test/java/com/programmers/devcourse/model/SayingTest.java b/board/src/test/java/com/programmers/devcourse/model/SayingTest.java
new file mode 100644
index 0000000..0a20b41
--- /dev/null
+++ b/board/src/test/java/com/programmers/devcourse/model/SayingTest.java
@@ -0,0 +1,34 @@
+package com.programmers.devcourse.model;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.*;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+
+class SayingTest {
+    @Nested
+    @DisplayName("명언객체 필드 조회 테스트")
+    class SayingFieldTest {
+        @Test
+        void getFieldSuccessTest() {
+            // given
+            String author = "author";
+
+            String contents = "contents";
+            Saying saying = new Saying(author, contents);
+
+            // when
+            System.out.println("=====Logic Start=====");
+
+            assertAll(() -> assertThat(saying.getAuthor()).isEqualTo(author),
+                    () -> assertThat(saying.getContents()).isEqualTo(contents));
+
+            System.out.println("=====Logic End=====");
+            // then
+        }
+    }
+
+}
\ No newline at end of file