diff --git a/src/App.js b/src/App.js
index c38b30d5b..421612e66 100644
--- a/src/App.js
+++ b/src/App.js
@@ -1,5 +1,99 @@
+import * as MissionUtils from "@woowacourse/mission-utils";
+
 class App {
-  async play() {}
+  async play() {
+
+    
+    const getComputerNumber = () => {
+      let computerNumbers = [];
+      while (computerNumbers.length < 3) {
+        const number = MissionUtils.Random.pickNumberInRange(1, 9);
+        if (!computerNumbers.includes(number)) {
+          computerNumbers.push(number);
+        }
+      }
+      return computerNumbers.join(""); // 문자열 변환
+    };
+
+    const getPlayerNumbers = async () => {
+      try {
+        const answer = await MissionUtils.Console.readLineAsync(
+          "숫자를 입력해주세요: "
+        );
+        if (answer.length !== 3 || !/^\d{3}$/.test(answer)) {
+          throw new Error("[ERROR] 올바른 3자리 숫자를 입력하세요.");
+        }
+        return answer;
+      } catch (error) {
+        throw error;
+      }
+    };
+
+    const startGame = async (computerNumbers) => {
+      const playerNumbers = await getPlayerNumbers();
+
+      if (computerNumbers === playerNumbers) {
+        MissionUtils.Console.print(
+          "3스트라이크 \n3개의 숫자를 모두 맞히셨습니다! 게임 종료"
+        );
+        return await askGameAgain();
+      }
+
+      const result = compareNumbers(computerNumbers, playerNumbers);
+      MissionUtils.Console.print(result);
+      await startGame(computerNumbers);
+    };
+
+    const compareNumbers = (computerNumbers, playerNumbers) => {
+      let strike = 0;
+      let ball = 0;
+
+      for (let i = 0; i < 3; i++) {
+        if (computerNumbers[i] === playerNumbers[i]) {
+          strike++;
+        } else if (computerNumbers.includes(playerNumbers[i])) {
+          ball++;
+        }
+      }
+
+      return printResult(strike, ball);
+    };
+
+    const printResult = (strike, ball) => {
+      if (strike === 0 && ball === 0) return "낫싱";
+      if (strike === 0) return `${ball}볼`;
+      if (ball === 0) return `${strike}스트라이크`;
+      return `${ball}볼 ${strike}스트라이크`;
+    };
+
+    const askGameAgain = async () => {
+      try {
+        const answer = await MissionUtils.Console.readLineAsync(
+          "게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.\n"
+        );
+        if (answer === "1") {
+          return await initialStartGame();
+        }
+        if (answer === "2") {
+          MissionUtils.Console.print("게임 종료");
+          return;
+        }
+        throw new Error("[ERROR] 1 또는 2만 입력하세요.");
+      } catch (error) {
+        MissionUtils.Console.print(error.message);
+        return askGameAgain();
+      }
+    };
+
+
+    const initialStartGame = async () => {
+      const computerNumbers = getComputerNumber();
+      await startGame(computerNumbers);
+    };
+
+    MissionUtils.Console.print("숫자 야구 게임을 시작합니다.");
+    await initialStartGame();
+  }
 }
 
-export default App;
+export default App;
\ No newline at end of file