diff --git a/restful-web-service/src/main/java/com/example/restfulwebservice/user/Post.java b/restful-web-service/src/main/java/com/example/restfulwebservice/user/Post.java
new file mode 100644
index 00000000..e2933daf
--- /dev/null
+++ b/restful-web-service/src/main/java/com/example/restfulwebservice/user/Post.java
@@ -0,0 +1,24 @@
+package com.example.restfulwebservice.user;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.*;
+
+@Entity
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class Post {
+    @Id
+    @GeneratedValue
+    private Integer id;
+    private String description;
+
+    // User : Post -> 1 : (0~N)
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JsonIgnore
+    private User user;
+}
diff --git a/restful-web-service/src/main/java/com/example/restfulwebservice/user/PostRepository.java b/restful-web-service/src/main/java/com/example/restfulwebservice/user/PostRepository.java
new file mode 100644
index 00000000..425d494c
--- /dev/null
+++ b/restful-web-service/src/main/java/com/example/restfulwebservice/user/PostRepository.java
@@ -0,0 +1,8 @@
+package com.example.restfulwebservice.user;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface PostRepository extends JpaRepository<Post, Integer> {
+}
diff --git a/restful-web-service/src/main/java/com/example/restfulwebservice/user/User.java b/restful-web-service/src/main/java/com/example/restfulwebservice/user/User.java
index e158ca67..42e8aa46 100644
--- a/restful-web-service/src/main/java/com/example/restfulwebservice/user/User.java
+++ b/restful-web-service/src/main/java/com/example/restfulwebservice/user/User.java
@@ -12,9 +12,11 @@ import lombok.NoArgsConstructor;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
+import javax.persistence.OneToMany;
 import javax.validation.constraints.Past;
 import javax.validation.constraints.Size;
 import java.util.Date;
+import java.util.List;
 
 @Data
 @AllArgsConstructor
@@ -39,4 +41,15 @@ public class User {
 
     @ApiModelProperty(notes = "사용자의 주민번호을 입력해 주세요")
     private String ssn;
+
+    @OneToMany(mappedBy = "user")
+    private List<Post> posts;
+
+    public User(Integer id, String name, Date joinDate, String password, String ssn) {
+        this.id = id;
+        this.name = name;
+        this.joinDate = joinDate;
+        this.password = password;
+        this.ssn = ssn;
+    }
 }
diff --git a/restful-web-service/src/main/java/com/example/restfulwebservice/user/UserJpaController.java b/restful-web-service/src/main/java/com/example/restfulwebservice/user/UserJpaController.java
index 71d03923..e7822332 100644
--- a/restful-web-service/src/main/java/com/example/restfulwebservice/user/UserJpaController.java
+++ b/restful-web-service/src/main/java/com/example/restfulwebservice/user/UserJpaController.java
@@ -20,6 +20,7 @@ import static org.springframework.hateoas.server.mvc.WebMvcLinkBuilder.methodOn;
 @RequestMapping("/jpa")
 public class UserJpaController {
     private final UserRepository userRepository;
+    private final PostRepository postRepository;
 
     @GetMapping("/users")
     public List<User> retrieveAllUsers() {
@@ -56,4 +57,32 @@ public class UserJpaController {
 
         return ResponseEntity.created(location).build();
     }
+
+    @GetMapping("/users/{id}/posts")
+    public List<Post> retrieveAllPostByUser(@PathVariable int id) {
+        Optional<User> user = userRepository.findById(id);
+        if(user.isEmpty()){
+            throw new UserNotFoundException(String.format("ID[%s] not found", id));
+        }
+
+        return user.get().getPosts();
+    }
+
+    @PostMapping("/users/{id}/posts")
+    public ResponseEntity<Post> createPost(@PathVariable int id, @RequestBody Post post) {
+        Optional<User> user = userRepository.findById(id);
+        if(user.isEmpty()){
+            throw new UserNotFoundException(String.format("ID[%s] not found", id));
+        }
+
+        post.setUser(user.get());
+        Post savedPost = postRepository.save(post);
+
+        URI location = ServletUriComponentsBuilder.fromCurrentRequest()
+                .path("/{id}")
+                .buildAndExpand(savedPost.getId())
+                .toUri();
+
+        return ResponseEntity.created(location).build();
+    }
 }
diff --git a/restful-web-service/src/main/resources/data.sql b/restful-web-service/src/main/resources/data.sql
index 832b516e..db3541df 100644
--- a/restful-web-service/src/main/resources/data.sql
+++ b/restful-web-service/src/main/resources/data.sql
@@ -1,3 +1,7 @@
-insert into user values(100000, sysdate(), 'user1', 'test1', '700101-1111111');
-insert into user values(100001, sysdate(), 'user2', 'test2', '800101-1231234');
-insert into user values(100002, sysdate(), 'user3', 'test3', '900101-1121123');
\ No newline at end of file
+insert into user values(10000, sysdate(), 'user1', 'test1', '700101-1111111');
+insert into user values(10001, sysdate(), 'user2', 'test2', '800101-1231234');
+insert into user values(10002, sysdate(), 'user3', 'test3', '900101-1121123');
+
+insert into post values(10000, 'first post', 10000);
+insert into post values(10001, 'second post', 10001);
+insert into post values(10002, 'third post' , 10002);
\ No newline at end of file