diff --git a/README.md b/README.md
index 8d7e8aee..967740b2 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,24 @@
-# java-baseball-precourse
\ No newline at end of file
+# java-baseball-precourse
+기능요구사항
+
+[힌트제시]
+같은자리에 같은수 : 스트라이크
+다른자리 숫자가 같음 : 볼
+같은수 0 개 : 낫싱
+
+[승리조건]
+컴퓨터의 숫자 전체를 맞추면 승리
+
+기능 목록
+
+플레이어 클래스
+* 숫자입력받기
+
+계산 클래스
+* 컴퓨터의 숫자 정하기 : 랜덤 값
+* 입력값과 컴퓨터값 비교
+    * 비교결과로 힌트 제시
+    * 일치할때 게임종료 및 게임 재시작 멘트 
+
+게임 실행 클래스
+* 게임을 실행한다 
\ No newline at end of file
diff --git a/src/main/java/Application.java b/src/main/java/Application.java
new file mode 100644
index 00000000..73ccd0be
--- /dev/null
+++ b/src/main/java/Application.java
@@ -0,0 +1,19 @@
+import java.util.List;
+
+public class Application {
+    public static void main(String[] args) {
+        Player pl = new Player();
+        Computer com = new Computer();
+        OneGameProgress oneGameProgress= new OneGameProgress();
+
+        boolean gameProgress = true;
+
+        while (gameProgress) {
+            List<Integer> comNums= com.setComNum();
+            oneGameProgress.oneGame(comNums,pl,com);
+            gameProgress = oneGameProgress.gameRestart();
+        }
+
+
+    }
+}
diff --git a/src/main/java/Computer.java b/src/main/java/Computer.java
new file mode 100644
index 00000000..51805587
--- /dev/null
+++ b/src/main/java/Computer.java
@@ -0,0 +1,66 @@
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+public class Computer {
+    public List<Integer> setComNum() {
+        Random r = new Random();
+        List<Integer> comNum = new ArrayList<>();
+        while (comNum.size() < 3) {
+            int RandomInt= r.nextInt(1, 9);
+            if (!comNum.contains(RandomInt)) {
+                comNum.add(RandomInt);
+            }
+        }
+        return comNum;
+
+    }
+
+    public boolean compare(List<Integer> a, List<Integer> b) {
+        int strikeNum = 0;
+        int ballNum = 0;
+
+        for (int i = 0; i < 3; i++) {
+            for (int j = 0; j < 3; j++) {
+                strikeNum += isStrike(a.get(i), b.get(j), i, j);
+                ballNum += isBall(a.get(i), b.get(j), i, j);
+            }
+        }
+        if (strikeNum ==3){
+            System.out.println("3스트라이크");
+            System.out.println("3개의 숫자를 모두 맞히셨습니다! 게임 종료");
+            return true;
+        } else if(strikeNum !=0 && ballNum !=0){
+            System.out.printf("%d볼 %d스트라이크\n",ballNum,strikeNum);
+            return false;
+        } else if(strikeNum ==0 & ballNum !=0){
+            System.out.printf("%d볼\n",ballNum);
+            return false;
+        } else if(strikeNum !=0 & ballNum ==0){
+            System.out.printf("%d스트라이크\n",strikeNum);
+            return false;
+        } else if(strikeNum ==0 & ballNum ==0){
+            System.out.println("낫싱");
+            return false;
+        } else{
+            return false; // 이부분 수정 필요
+        }
+    }
+
+    public int isStrike(int aNum, int bNum, int aIdx, int bIdx) {
+        if ((aNum == bNum) && (aIdx == bIdx)) {
+            return 1;
+        } else {
+            return 0;
+        }
+    }
+    public int isBall(int aNum, int bNum,int aIdx,int bIdx){
+        if ((aNum == bNum) && (aIdx!=bIdx)) {
+            return 1;
+        }else {
+            return 0;
+        }
+    }
+
+
+}
diff --git a/src/main/java/OneGameProgress.java b/src/main/java/OneGameProgress.java
new file mode 100644
index 00000000..1c4fc6b0
--- /dev/null
+++ b/src/main/java/OneGameProgress.java
@@ -0,0 +1,32 @@
+import java.util.List;
+import java.util.Scanner;
+
+public class OneGameProgress {
+    public void oneGame(List<Integer> comNum,Player player,Computer computer){
+        boolean isStrike= false;
+        while (!isStrike) {
+            isStrike= computer.compare(comNum, player.getNum());
+        }
+    }
+
+
+    public boolean gameRestart(){
+        System.out.println("게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.");
+        Scanner sc = new Scanner(System.in);
+        try{
+            int num = sc.nextInt();
+            if (num ==1) {
+                return true;
+            } else if (num == 2) {
+                return false;
+            }else {
+                throw new IllegalArgumentException();
+            }
+
+        }catch (IllegalArgumentException e){
+            throw new IllegalArgumentException();
+        }
+
+
+    }
+}
diff --git a/src/main/java/Player.java b/src/main/java/Player.java
new file mode 100644
index 00000000..4d000e40
--- /dev/null
+++ b/src/main/java/Player.java
@@ -0,0 +1,48 @@
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+public class Player {
+    public List<Integer> getNum(){
+        System.out.print("숫자를 입력해 주세요 : ");
+        Scanner sc= new Scanner(System.in);
+        try {
+            String inputInt = sc.next();
+
+            if (inputInt.length() != 3){
+                throw new IllegalArgumentException();
+            }
+
+            if ((inputInt.charAt(0) != inputInt.charAt(1)) && (inputInt.charAt(0) != inputInt.charAt(2)) && (inputInt.charAt(2) != inputInt.charAt(1))){
+                return makeListInt(inputInt);
+            } else {
+                throw new IllegalArgumentException();
+            }
+
+        } catch (IllegalArgumentException e){
+            throw new IllegalArgumentException();
+        }
+    }
+
+    public List<Integer> makeListInt(String inputInt){
+        List<Integer> inputIntList = new ArrayList<>();
+
+        for(int i = 0; i<3;i++){
+            int a = Integer.parseInt(Character.toString(inputInt.charAt(i)));
+
+            if (checkRange(a)) {
+                inputIntList.add(a);
+            }
+        }
+        return inputIntList;
+    }
+
+    public boolean checkRange(int i){
+        if ((i >=0) & (i <9)) {
+            return true;
+        } else {
+            throw new IllegalArgumentException();
+        }
+    }
+
+}