diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e996746
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+.idea
+out
+javaStudyWeek2.iml
diff --git a/README.md b/README.md
index 6b1f44f..c2714e1 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,4 @@
 # 2023-1-java-study
-SSCC 2023년 1학기 Java 기초 스터디 과제 repo입니다.
-스터디원 여러분은 아래 규칙에 맞추어 과제를 올려주세요.
 
-## 과제 제출법
-1. SSCC Organization에 멤버 추가를 요청한다.
-2. Java 스터디 repo에 본인 Github 아이디로 브랜치를 생성한다.
-3. 스터디 repo를 fork한다.
-4. fork한 repo(내 계정!!!)에 과제를 업로드한다.
-5. SSCC-space의 본인 닉네임 브랜치로 PR을 넣는다.
-6. 스터디장이 Comment로 피드백을 준다. Merge되면 과제 완료!
+SSCC  
+2023년 1학기 Java 기초 스터디 과제 **repo**.
diff --git a/javastudy.iml b/javastudy.iml
new file mode 100644
index 0000000..ee3eb20
--- /dev/null
+++ b/javastudy.iml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module-library">
+      <library name="JUnit5.8.1">
+        <CLASSES>
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter/5.8.1/junit-jupiter-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-api/5.8.1/junit-jupiter-api-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-commons/1.8.1/junit-platform-commons-1.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/apiguardian/apiguardian-api/1.1.2/apiguardian-api-1.1.2.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-params/5.8.1/junit-jupiter-params-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-engine/5.8.1/junit-jupiter-engine-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-engine/1.8.1/junit-platform-engine-1.8.1.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
+  </component>
+</module>
\ No newline at end of file
diff --git a/src/DefaultCarBuilder.java b/src/DefaultCarBuilder.java
new file mode 100644
index 0000000..89bad64
--- /dev/null
+++ b/src/DefaultCarBuilder.java
@@ -0,0 +1,33 @@
+import utils.Car;
+import utils.CarBuilder;
+
+public class DefaultCarBuilder implements CarBuilder {
+    String name;
+    int speed;
+    boolean isSupercar;
+
+    public DefaultCarBuilder() {
+    }
+
+    public DefaultCarBuilder name(String name) {
+        this.name = name;
+        return this;
+    }
+
+    public DefaultCarBuilder speed(int speed) {
+        this.speed = speed;
+        return this;
+    }
+
+    public DefaultCarBuilder isSupercar(int supercar) {
+        isSupercar = supercar == 1;
+        return this;
+    }
+
+    public Car build() {
+        if (isSupercar) {
+            return new SuperCar(this.name, this.speed);
+        }
+        return new NormalCar(this.name, this.speed);
+    }
+}
diff --git a/src/Main.java b/src/Main.java
new file mode 100644
index 0000000..496f8fd
--- /dev/null
+++ b/src/Main.java
@@ -0,0 +1,47 @@
+import utils.Car;
+import utils.MessageEnum;
+
+import java.util.Scanner;
+
+public class Main {
+    private static final Scanner input = new Scanner(System.in);
+
+    public static int getSizeOfCars() {
+        MessageEnum.INIT_CARS.printMessage();
+        return input.nextInt();
+    }
+
+    public static Car makeCar() {
+        MessageEnum.INPUT_NAME.printMessage(); // [ System ] 해당 자동차의 이름을 입력해주세요. (type: String)
+        String name = input.next();
+        MessageEnum.INPUT_SPEED.printMessage(); // [ System ] 해당 자동차의 속도를 입력해주세요. (type: integer)
+        int speed = input.nextInt();
+        MessageEnum.INPUT_IS_SPUERCAR.printMessage(); // [ System ] 해당 자동차는 SuperCar 인가요? (True = 1, False = 0)
+        int isSupercar = input.nextInt();
+
+        return new DefaultCarBuilder()
+                .name(name)
+                .speed(speed)
+                .isSupercar(isSupercar)
+                .build();
+    }
+
+    public static int getLoopTime() {
+        MessageEnum.GAME_TIME.printMessage();
+        return input.nextInt();
+    }
+
+    public static void main(String[] args) {
+        int sizeOfCars = getSizeOfCars();
+        RacingGame game = new RacingGame();
+
+        for (int count = 0; count < sizeOfCars; count++) {
+            MessageEnum.NUMBER_OF_CAR.getNumberOfCars(count + 1, sizeOfCars); // [i/n] ==========
+            game.addRacingCar(makeCar());
+        }
+
+        game.broadcastCars();
+        game.toRacing(getLoopTime());
+        game.broadcastResult();
+    }
+}
\ No newline at end of file
diff --git a/src/NormalCar.java b/src/NormalCar.java
new file mode 100644
index 0000000..e7cbcab
--- /dev/null
+++ b/src/NormalCar.java
@@ -0,0 +1,45 @@
+import utils.Car;
+
+import java.util.Random;
+
+public class NormalCar implements Car {
+    private String name = "";
+    private int speed = 0;
+    private int score = 0;
+
+    public NormalCar(String name, int speed) {
+        this.name = name;
+        this.speed = speed;
+    }
+
+
+    @Override
+    public String getName() {
+        return this.name;
+    }
+
+    @Override
+    public int getSpeed() {
+        return this.speed;
+    }
+
+    @Override
+    public void describe() {
+        System.out.print("[ " + this.name + "(Normal) ] ");
+        System.out.print("Speed : " + this.speed);
+        System.out.println();
+    }
+
+    @Override
+    public void move() {
+        Random random = new Random();
+        this.score += random.nextInt(2) * this.speed;
+    }
+
+    @Override
+    public void printResult() {
+        System.out.print("[ " + this.name + "(Normal) ] ");
+        System.out.print("score : " + this.score);
+        System.out.println();
+    }
+}
\ No newline at end of file
diff --git a/src/RacingGame.java b/src/RacingGame.java
new file mode 100644
index 0000000..4b9a257
--- /dev/null
+++ b/src/RacingGame.java
@@ -0,0 +1,39 @@
+import utils.Car;
+
+import java.util.ArrayList;
+
+public class RacingGame {
+    private int sizeOfCars;
+    private ArrayList<Car> cars = new ArrayList<Car>();
+
+    public RacingGame() {
+    }
+
+    public int getSizeOfCars() {
+        return cars.size();
+    }
+
+    public void addRacingCar(Car car) {
+        cars.add(car);
+    }
+
+    public void toRacing(int time) {
+        for (Car car : cars) {
+            car.go(time);
+        }
+    }
+
+    public void broadcastCars() {
+        for (Car car : cars) {
+            car.describe();
+        }
+    }
+
+    public void broadcastResult() {
+        for (Car car : cars) {
+            car.printResult();
+        }
+    }
+
+
+}
diff --git a/src/SuperCar.java b/src/SuperCar.java
new file mode 100644
index 0000000..3fd32e1
--- /dev/null
+++ b/src/SuperCar.java
@@ -0,0 +1,52 @@
+import utils.Car;
+
+import java.util.Random;
+
+public class SuperCar implements Car {
+    private String name = "";
+    private int speed = 0;
+    private int score = 0;
+    private int boostCount = 0;
+
+    public SuperCar(String name, int speed) {
+        this.name = name;
+        this.speed = speed;
+    }
+
+
+    @Override
+    public String getName() {
+        return this.name;
+    }
+
+    @Override
+    public int getSpeed() {
+        return this.speed;
+    }
+
+    @Override
+    public void describe() {
+        System.out.print("[ " + this.name + "(Super) ] ");
+        System.out.print("Speed : " + this.speed);
+        System.out.println();
+    }
+
+    @Override
+    public void move() {
+        Random random = new Random();
+        int mainActive = random.nextInt(2);
+        int boostMultiply = 2 - random.nextInt(2);
+        if (mainActive == 1 && boostMultiply == 2) {
+            boostCount++;
+        }
+        this.score += mainActive * boostMultiply * this.speed;
+    }
+
+    @Override
+    public void printResult() {
+        System.out.print("[ " + this.name + "(Super) ]");
+        System.out.print(" score : " + this.score);
+        System.out.print(" active boost : " + this.boostCount);
+        System.out.println();
+    }
+}
\ No newline at end of file
diff --git a/src/utils/Car.java b/src/utils/Car.java
new file mode 100644
index 0000000..d7e8945
--- /dev/null
+++ b/src/utils/Car.java
@@ -0,0 +1,22 @@
+package utils;
+
+public interface Car {
+    String name = "";
+    int speed = 0;
+
+    public String getName();
+
+    public int getSpeed();
+
+    public void describe();
+
+    public default void go(int time) {
+        for (int i = 0; i < time; i++) {
+            this.move();
+        }
+    }
+
+    void move();
+
+    public void printResult();
+}
diff --git a/src/utils/CarBuilder.java b/src/utils/CarBuilder.java
new file mode 100644
index 0000000..1fa845c
--- /dev/null
+++ b/src/utils/CarBuilder.java
@@ -0,0 +1,11 @@
+package utils;
+
+public interface CarBuilder {
+    public CarBuilder name(String name);
+
+    public CarBuilder speed(int speed);
+
+    public CarBuilder isSupercar(int supercar);
+
+    public Car build();
+}
diff --git a/src/utils/MessageEnum.java b/src/utils/MessageEnum.java
new file mode 100644
index 0000000..2eeccee
--- /dev/null
+++ b/src/utils/MessageEnum.java
@@ -0,0 +1,42 @@
+package utils;
+
+public enum MessageEnum {
+    // utils.Car Initialize
+    INIT_CARS("자동차의 갯수를 입력해주세요."),
+    INPUT_NAME("해당 자동차의 이름을 입력해주세요. (type: String)"),
+    INPUT_SPEED("해당 자동차의 속도를 입력해주세요. (type: integer)"),
+    INPUT_IS_SPUERCAR("해당 자동차는 SuperCar 인가요? (True = 1, False = 0)"),
+    NUMBER_OF_CAR(""),
+
+    // utils.Car Show
+    CAR_SHOW("\n\n\n===== : 경기 참가자 소개 : ====="),
+    BROADCAST_WINNER("===== : 최종 결과 발표 : ====="),
+
+    GAME_TIME("경기를 몇 초동안 진행시킬까요? (type: integer)"),
+
+    INPUT_FAIL("입력 오류. 다시 한번 입력해주세요.");
+
+
+    String s;
+    String PREFIX = "[ ! ] ";
+
+    MessageEnum(String s) {
+        this.s = s;
+    }
+
+    public String getMessage() {
+        return this.s;
+    }
+
+    public void printMessage() {
+        System.out.println(PREFIX + this.s);
+    }
+
+    public void getNumberOfCars(int curr, int size) {
+        if (!this.name().equals("NUMBER_OF_CAR")) {
+            return;
+        } // 다른 경우 예외 처리
+        String res = "\n[" + curr + "/" + size + "] ==========";
+        System.out.println(res);
+    }
+}
diff --git a/test/MainTest.java b/test/MainTest.java
new file mode 100644
index 0000000..bd735f8
--- /dev/null
+++ b/test/MainTest.java
@@ -0,0 +1,44 @@
+import org.junit.jupiter.api.*;
+import utils.Car;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class MainTest {
+    private static Main main;
+    private static Car[] cars;
+    private static RacingGame game;
+
+
+    @BeforeAll
+    static void initTest() {
+        game = new RacingGame();
+        cars = new Car[]{
+                new SuperCar("A", 1),
+                new NormalCar("B", 2)};
+    }
+
+    @Test
+    @DisplayName("자동차 등록 및 크기 확")
+    void getSizeOfCars() {
+        game = new RacingGame();
+        int totalCount = cars.length;
+
+        for (Car car : cars) {
+            game.addRacingCar(car);
+        }
+
+        game.broadcastCars();
+        assertEquals(game.getSizeOfCars(), totalCount);
+    }
+
+    @Test
+    @DisplayName("게임 시작 및 게임 결과 확인")
+    void startRacing() {
+        for (Car car : cars) {
+            game.addRacingCar(car);
+        }
+
+        game.toRacing(10);
+        game.broadcastResult();
+    }
+}
\ No newline at end of file