diff --git a/src/main/java/com/maximus/spring_server/controller/AccountController.java b/src/main/java/com/maximus/spring_server/controller/AccountController.java
new file mode 100644
index 0000000..7c57af5
--- /dev/null
+++ b/src/main/java/com/maximus/spring_server/controller/AccountController.java
@@ -0,0 +1,38 @@
+package com.maximus.spring_server.controller;
+
+import com.maximus.spring_server.domain.User;
+import com.maximus.spring_server.service.AccountService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@CrossOrigin
+public class AccountController {
+
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+
+    @Autowired
+    public AccountController(AccountService accountService) {
+        this.accountService = accountService;
+    }
+
+    private final AccountService accountService;
+
+    @PostMapping("/account/signup")
+    public ResponseEntity<User> responseEntity(@RequestBody User user) throws Exception {
+        try {
+            User user1 = accountService.signup(user);
+            return ResponseEntity.status(HttpStatus.CREATED).body(User.builder().userId(user1.getUserId()).username(user1.getUsername()).build());
+        } catch (Exception e) {
+            logger.info("에러");
+            return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(User.builder().build());
+        }
+    }
+}
diff --git a/src/main/java/com/maximus/spring_server/domain/User.java b/src/main/java/com/maximus/spring_server/domain/User.java
new file mode 100644
index 0000000..fb82b40
--- /dev/null
+++ b/src/main/java/com/maximus/spring_server/domain/User.java
@@ -0,0 +1,48 @@
+package com.maximus.spring_server.domain;
+
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import java.util.List;
+
+@Entity
+@Getter
+@Builder
+@NoArgsConstructor
+public class User {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long userId;
+
+    private String username;
+    private String password;
+
+//    @Builder
+//    public User(String username, String password) {
+//        this.username = username;
+//        this.password = password;
+//    }
+
+
+    public User(Long userId, String username, String password) {
+        this.userId = userId;
+        this.username = username;
+        this.password = password;
+    }
+
+    public void ExitUser(List<User> user) throws IllegalArgumentException {
+        for (User user1 : user) {
+            if (user1.getUsername().equals(this.getUsername())) {
+                throw new IllegalArgumentException();
+            }
+        }
+
+    }
+}
diff --git a/src/main/java/com/maximus/spring_server/repository/UserRepository.java b/src/main/java/com/maximus/spring_server/repository/UserRepository.java
new file mode 100644
index 0000000..d31321f
--- /dev/null
+++ b/src/main/java/com/maximus/spring_server/repository/UserRepository.java
@@ -0,0 +1,9 @@
+package com.maximus.spring_server.repository;
+
+import com.maximus.spring_server.domain.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface UserRepository extends JpaRepository<User,Long> {
+}
diff --git a/src/main/java/com/maximus/spring_server/service/AccountService.java b/src/main/java/com/maximus/spring_server/service/AccountService.java
new file mode 100644
index 0000000..5a4677c
--- /dev/null
+++ b/src/main/java/com/maximus/spring_server/service/AccountService.java
@@ -0,0 +1,32 @@
+package com.maximus.spring_server.service;
+
+import com.maximus.spring_server.domain.User;
+import com.maximus.spring_server.repository.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+
+@Service
+@Transactional
+public class AccountService {
+
+    private final UserRepository userRepository;
+
+    @Autowired
+    public AccountService(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+
+    @Transactional
+    public User signup(User user) throws IllegalArgumentException {
+        List<User> userList = userRepository.findAll();
+        try {
+            user.ExitUser(userList);
+            return userRepository.save(user);
+        } catch (IllegalArgumentException e) {
+            throw new IllegalArgumentException();
+        }
+    }
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 8b13789..18ea875 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -1 +1,5 @@
-
+spring.datasource.url=jdbc:h2:mem:testdb
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=1234
+spring.h2.console.enabled=true