diff --git a/src/App.java b/src/App.java
new file mode 100644
index 0000000..e91fcca
--- /dev/null
+++ b/src/App.java
@@ -0,0 +1,110 @@
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class App {
+
+    Scanner sc = new Scanner(System.in);
+    String content;
+    String author;
+
+    private int lastId = 0;
+    private final ArrayList<WiseSaying> wiseSayingList = new ArrayList<>();
+
+    public void run() {
+        wiseSayingAdd("꿈을 지녀라. 그러면 어려운 현실을 이길 수 있다.", "월트 디즈니");
+        wiseSayingAdd("현재를 사랑하라.", "작자 미상");
+
+        System.out.println("== 명언 앱 ==");
+        while (true) {
+            System.out.print("명령) ");
+            String command = sc.nextLine();
+
+            switch (command.split("\\?")[0]) {
+                case "등록":
+                    wiseSayingRegister();
+                    break;
+                case "종료":
+                    System.out.println("명언 앱을 종료합니다.");
+                    return;
+                case "목록":
+                    wiseSayingInventory();
+                    break;
+                default:
+                    if (command.startsWith("삭제?id=")) {
+                        int id = Integer.parseInt(command.substring(6));
+                        wiseSayingDelete(id);
+                    } else if (command.startsWith("수정?id=")) {
+                        int id = Integer.parseInt(command.substring(6));
+                        wiseSayingUpdate(id);
+                    } else {
+                        System.out.println("다시 입력해 주세요.");
+                    }
+                    break;
+            }
+        }
+    }
+
+    private void wiseSayingUpdate(int targetId) {
+        WiseSaying wiseSaying = wiseSayingFind(targetId);
+
+        if (wiseSaying == null) {
+            System.out.println("%d번 명언은 존재하지 않습니다.".formatted(targetId));
+            return;
+        }
+        System.out.println("명언(기존) : %s".formatted(wiseSaying.getContent()));
+        System.out.print("명언 : ");
+        String newContent = sc.nextLine();
+        System.out.println("작가(기존) : %s".formatted(wiseSaying.getAuthor()));
+        System.out.print("작가 : ");
+        String newAuthor = sc.nextLine();
+
+        wiseSaying.setContent(newContent);
+        wiseSaying.setAuthor(newAuthor);
+
+        System.out.println("%d번 명언이 수정되었습니다.".formatted(targetId));
+    }
+
+    private WiseSaying wiseSayingFind(int targetId) {
+        for (WiseSaying wiseSaying : wiseSayingList) {
+            if (wiseSaying.getId() == targetId) {
+                return wiseSaying;
+            }
+        }
+        return null;
+    }
+
+    private void wiseSayingDelete(int targetId) {
+        WiseSaying wiseSaying = wiseSayingFind(targetId);
+        if (wiseSaying == null) {
+            System.out.println("%d번 명언은 존재하지 않습니다.".formatted(targetId));
+            return;
+        }
+        wiseSayingList.remove(wiseSaying);
+        System.out.println("%d번 명언이 삭제되었습니다.".formatted(targetId));
+    }
+
+    private void wiseSayingInventory() { // 목록
+        System.out.println("번호 / 작가 / 명언");
+        System.out.println("----------------------");
+        for (WiseSaying wiseSaying : wiseSayingList.reversed()) {
+            System.out.println("%d / %s / %s".formatted(wiseSaying.getId(), wiseSaying.getAuthor(), wiseSaying.getContent()));
+        }
+    }
+
+    private void wiseSayingRegister() { // 등록
+        System.out.print("명언 : ");
+        content = sc.nextLine();
+
+        System.out.print("작가 : ");
+        author = sc.nextLine();
+
+        wiseSayingAdd(content, author);
+
+        System.out.println("%d번 명언이 종료되었습니다.".formatted(lastId));
+    }
+
+    public void wiseSayingAdd(String content, String author) { // 명언 등록
+        WiseSaying wiseSaying = new WiseSaying(++lastId, content, author);
+        wiseSayingList.add(wiseSaying);
+    }
+}
\ No newline at end of file
diff --git a/src/Main.java b/src/Main.java
new file mode 100644
index 0000000..635d37f
--- /dev/null
+++ b/src/Main.java
@@ -0,0 +1,7 @@
+public class Main {
+    public static void main(String[] args) {
+        App app = new App();
+        app.run();
+
+    }
+}
diff --git a/src/WiseSaying.java b/src/WiseSaying.java
new file mode 100644
index 0000000..069d351
--- /dev/null
+++ b/src/WiseSaying.java
@@ -0,0 +1,36 @@
+public class WiseSaying {
+
+    private int id;
+    private String content;
+    private String author;
+
+    public WiseSaying(int id, String content, String author) {
+        this.id = id;
+        this.content = content;
+        this.author = author;
+    }
+
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public int getId() {
+        return id;
+    }
+}