diff --git a/build.gradle b/build.gradle
index 08cc7c0..aaa64cb 100644
--- a/build.gradle
+++ b/build.gradle
@@ -23,6 +23,7 @@ repositories {
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
 	implementation 'org.springframework.boot:spring-boot-starter-validation'
+	implementation 'org.springframework.boot:spring-boot-starter-actuator'
 	implementation 'org.springframework.boot:spring-boot-starter-security'
 
 	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
diff --git a/src/main/java/com/example/oneul/domain/post/api/PostCommandApi.java b/src/main/java/com/example/oneul/domain/post/api/PostCommandApi.java
new file mode 100644
index 0000000..48930c1
--- /dev/null
+++ b/src/main/java/com/example/oneul/domain/post/api/PostCommandApi.java
@@ -0,0 +1,38 @@
+package com.example.oneul.domain.post.api;
+
+import javax.servlet.http.HttpSession;
+
+import com.example.oneul.domain.post.domain.Post;
+import com.example.oneul.domain.post.dto.PostDTO;
+import com.example.oneul.domain.post.service.command.PostCommandService;
+
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+
+
+@RestController
+@RequestMapping(value = "/post")
+public class PostCommandApi {
+    private final PostCommandService postCommandService;
+    
+    public PostCommandApi(PostCommandService postCommandService){
+        this.postCommandService = postCommandService;
+    }
+
+    @RequestMapping(value="/", method=RequestMethod.POST)
+    public Post createPost(HttpSession httpSession, @RequestBody PostDTO postDTO) {
+        Post post = postCommandService.createPost(postDTO.toEntity(), httpSession);
+        return post;
+    }
+    
+    @RequestMapping(value="/{postId}/", method=RequestMethod.PUT)
+    public Post updatePost(HttpSession httpSession, @RequestBody PostDTO postDTO, @PathVariable Long postId) {
+        Post post = postCommandService.updatePost(postId, postDTO.toEntity(), httpSession);
+        return post;
+    }
+    
+}
diff --git a/src/main/java/com/example/oneul/domain/post/api/PostQueryApi.java b/src/main/java/com/example/oneul/domain/post/api/PostQueryApi.java
new file mode 100644
index 0000000..ee4bc83
--- /dev/null
+++ b/src/main/java/com/example/oneul/domain/post/api/PostQueryApi.java
@@ -0,0 +1,46 @@
+package com.example.oneul.domain.post.api;
+
+import java.util.List;
+
+import com.example.oneul.domain.post.domain.Post;
+import com.example.oneul.domain.post.service.query.PostQueryService;
+
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+
+
+
+@RestController
+@RequestMapping(value = "/post")
+public class PostQueryApi {
+    private final PostQueryService postQueryService;
+    
+    public PostQueryApi(PostQueryService postQueryService){
+        this.postQueryService = postQueryService;
+    }
+
+    @RequestMapping(value="", method=RequestMethod.GET)
+    public Page<Post> findAll(@RequestParam("page") Integer page) {
+        Page<Post> posts = postQueryService.findAll(PageRequest.of(page, 10));
+        return posts;
+    }
+
+    @RequestMapping(value="/writer/{writerId}", method=RequestMethod.GET)
+    public Page<Post> findAllByWriter(@PathVariable Long writerId, @RequestParam("page") Integer page) {
+        Page<Post> posts = postQueryService.findByWriter(writerId, PageRequest.of(page, 10));
+        return posts;
+    }
+
+    @GetMapping(value="/test")
+    public List<Post> test() {
+        return postQueryService.test();
+    }
+    
+}
diff --git a/src/main/java/com/example/oneul/domain/post/dao/PostCommandRepository.java b/src/main/java/com/example/oneul/domain/post/dao/PostCommandRepository.java
index 5e9f9df..53e8c9a 100644
--- a/src/main/java/com/example/oneul/domain/post/dao/PostCommandRepository.java
+++ b/src/main/java/com/example/oneul/domain/post/dao/PostCommandRepository.java
@@ -10,6 +10,7 @@ import org.springframework.data.repository.CrudRepository;
 public interface PostCommandRepository extends CrudRepository<Post, Long> {
     Post save(Post post);
     Optional<Post> findByIdAndWriter(Long id, UserEntity writer);
+    void deleteByIdAndWriter(Long id, UserEntity writer);
     void deleteById(Long id);
     void delete(Post post);
 }
\ No newline at end of file
diff --git a/src/main/java/com/example/oneul/domain/post/dao/PostQueryRepository.java b/src/main/java/com/example/oneul/domain/post/dao/PostQueryRepository.java
index 6a2c4cf..e351fe3 100644
--- a/src/main/java/com/example/oneul/domain/post/dao/PostQueryRepository.java
+++ b/src/main/java/com/example/oneul/domain/post/dao/PostQueryRepository.java
@@ -1,5 +1,6 @@
 package com.example.oneul.domain.post.dao;
 
+import java.util.List;
 import java.util.Optional;
 
 import com.example.oneul.domain.post.domain.Post;
@@ -12,5 +13,7 @@ import org.springframework.stereotype.Repository;
 @Repository
 public interface PostQueryRepository extends JpaRepository<Post, Long>{
     Optional<Post> findById(Long id);
+    List<Post> findAll();
     Page<Post> findAll(Pageable pageable);
+    Page<Post> findAllByWriter_Id(Long writerId, Pageable pageable);
 }
diff --git a/src/main/java/com/example/oneul/domain/post/domain/Post.java b/src/main/java/com/example/oneul/domain/post/domain/Post.java
index 61537f8..84b0605 100644
--- a/src/main/java/com/example/oneul/domain/post/domain/Post.java
+++ b/src/main/java/com/example/oneul/domain/post/domain/Post.java
@@ -1,5 +1,6 @@
 package com.example.oneul.domain.post.domain;
 
+import java.io.Serializable;
 import java.time.LocalDateTime;
 import java.util.Objects;
 
@@ -24,7 +25,7 @@ import org.springframework.data.jpa.domain.support.AuditingEntityListener;
 @Entity
 @EntityListeners(AuditingEntityListener.class)
 @Table(indexes = @Index(name = "i_post", columnList="createdAt"))
-public class Post {
+public class Post implements Serializable {
     @Id @GeneratedValue(strategy = GenerationType.AUTO)
     private Long id;
     @CreatedDate
@@ -32,7 +33,7 @@ public class Post {
     @Column(nullable = false)
     private String content;
     @Access(AccessType.PROPERTY)
-    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @ManyToOne(fetch = FetchType.EAGER, optional = false)
     private UserEntity writer;
     
     public Post() {}
diff --git a/src/main/java/com/example/oneul/domain/post/dto/PostDTO.java b/src/main/java/com/example/oneul/domain/post/dto/PostDTO.java
new file mode 100644
index 0000000..71675f1
--- /dev/null
+++ b/src/main/java/com/example/oneul/domain/post/dto/PostDTO.java
@@ -0,0 +1,30 @@
+package com.example.oneul.domain.post.dto;
+
+import javax.validation.constraints.NotBlank;
+
+import com.example.oneul.domain.post.domain.Post;
+
+public class PostDTO {
+    @NotBlank
+    private String content; 
+
+    public PostDTO() {}
+
+    public PostDTO(String content){
+        this.content = content;
+    }
+
+    public void setContent(String content){
+        this.content = content;
+    }
+
+    public String getContent(){
+        return this.content;
+    }
+
+    public Post toEntity() {
+        return Post.builder()
+            .content(content)
+            .build();
+    }
+}
diff --git a/src/main/java/com/example/oneul/domain/post/service/command/PostCommnadServiceImpl.java b/src/main/java/com/example/oneul/domain/post/service/command/PostCommnadServiceImpl.java
index df83a63..5b110a8 100644
--- a/src/main/java/com/example/oneul/domain/post/service/command/PostCommnadServiceImpl.java
+++ b/src/main/java/com/example/oneul/domain/post/service/command/PostCommnadServiceImpl.java
@@ -33,12 +33,12 @@ public class PostCommnadServiceImpl implements PostCommandService{
                 .writer(userEntity)
                 .build());
 
-        log.info("user: " + userEntity.toString() + " create " + post.toString());
+        log.info("user: " + userEntity.toString() + " create " + postEntity.toString());
         return postEntity;
     }
 
     @Override
-    public Post updatePost(Long id, Post post, HttpSession httpSession){  
+    public Post updatePost(Long id, Post post, HttpSession httpSession){ 
         UserEntity userEntity = (UserEntity) httpSession.getAttribute("user");
         // TODO: 적절한 방법인지 확인하기
         Post postEntity = postCommandRepository.findByIdAndWriter(id, userEntity).orElseThrow(() -> new NotFoundException(id + " post not found"));
@@ -51,7 +51,9 @@ public class PostCommnadServiceImpl implements PostCommandService{
 
     @Override
     public void deletePost(Long id, HttpSession httpSession){
-        postCommandRepository.deleteById(id);
+        // TODO: 이 때 세션이 만기되면 어떡함
+        UserEntity userEntity = (UserEntity)httpSession.getAttribute("user");
+        postCommandRepository.deleteByIdAndWriter(id, userEntity);
         log.info("post " + id + " is deleted");
     }
 }
diff --git a/src/main/java/com/example/oneul/domain/post/service/query/PostQueryService.java b/src/main/java/com/example/oneul/domain/post/service/query/PostQueryService.java
index 01c8136..32057b4 100644
--- a/src/main/java/com/example/oneul/domain/post/service/query/PostQueryService.java
+++ b/src/main/java/com/example/oneul/domain/post/service/query/PostQueryService.java
@@ -1,10 +1,14 @@
 package com.example.oneul.domain.post.service.query;
 
+import java.util.List;
+
 import com.example.oneul.domain.post.domain.Post;
 
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
 
 public interface PostQueryService {
+    List<Post> test();
     Page<Post> findAll(PageRequest pageRequest);
+    Page<Post> findByWriter(Long writerId, PageRequest pageRequest);
 }
diff --git a/src/main/java/com/example/oneul/domain/post/service/query/PostQueryServiceImpl.java b/src/main/java/com/example/oneul/domain/post/service/query/PostQueryServiceImpl.java
index 14ab690..f0fe4ac 100644
--- a/src/main/java/com/example/oneul/domain/post/service/query/PostQueryServiceImpl.java
+++ b/src/main/java/com/example/oneul/domain/post/service/query/PostQueryServiceImpl.java
@@ -1,5 +1,7 @@
 package com.example.oneul.domain.post.service.query;
 
+import java.util.List;
+
 import com.example.oneul.domain.post.dao.PostQueryRepository;
 import com.example.oneul.domain.post.domain.Post;
 
@@ -21,4 +23,14 @@ public class PostQueryServiceImpl implements PostQueryService {
     public Page<Post> findAll(PageRequest pageRequest){
         return postQueryRepository.findAll(pageRequest);
     }
+
+    @Override
+    public Page<Post> findByWriter(Long writerId, PageRequest pageRequest){
+        return postQueryRepository.findAllByWriter_Id(writerId, pageRequest);
+    }
+
+    @Override
+    public List<Post> test(){
+        return postQueryRepository.findAll();
+    }
 }
diff --git a/src/main/java/com/example/oneul/domain/user/domain/UserEntity.java b/src/main/java/com/example/oneul/domain/user/domain/UserEntity.java
index 839238f..3b13653 100644
--- a/src/main/java/com/example/oneul/domain/user/domain/UserEntity.java
+++ b/src/main/java/com/example/oneul/domain/user/domain/UserEntity.java
@@ -14,6 +14,7 @@ import javax.persistence.Id;
 import javax.persistence.OneToMany;
 
 import com.example.oneul.domain.post.domain.Post;
+import com.fasterxml.jackson.annotation.JsonIgnore;
 
 import org.springframework.data.annotation.CreatedDate;
 import org.springframework.data.jpa.domain.support.AuditingEntityListener;
@@ -25,9 +26,9 @@ public class UserEntity implements Serializable {
     private Long id;
     @Column(nullable = false, unique = true)
     private String username;
-    @Column(nullable = false)
+    @JsonIgnore @Column(nullable = false)
     private String password;
-    @CreatedDate
+    @JsonIgnore @CreatedDate
     private LocalDateTime createdAt;
     @OneToMany(orphanRemoval = true, cascade = CascadeType.REMOVE)
     private Set<Post> posts;
diff --git a/src/main/java/com/example/oneul/domain/user/service/UserServiceImpl.java b/src/main/java/com/example/oneul/domain/user/service/UserServiceImpl.java
index a062f1b..8f2e436 100644
--- a/src/main/java/com/example/oneul/domain/user/service/UserServiceImpl.java
+++ b/src/main/java/com/example/oneul/domain/user/service/UserServiceImpl.java
@@ -37,6 +37,8 @@ public class UserServiceImpl implements UserService {
                                               .password(
                                                   passwordEncoder.encode(userEntity.getPassword()))
                                               .build();
+        userRepository.save(user);
+        log.info("user is created: " + user.toString());
         return user;
     }
 
@@ -45,14 +47,16 @@ public class UserServiceImpl implements UserService {
         UserEntity user =  userRepository.findByUsername(userEntity.getUsername())
                                          .orElseThrow(() -> new WrongUsernameAndPasswordException("wrong username"));
 
-        if(passwordEncoder.matches(userEntity.getPassword(), user.getPassword())){
-            log.info("login user: " + userEntity.toString());
-            httpSession.setAttribute("user",user);
-            log.info("session id: " + httpSession.getId());
-            log.info("session value: " + httpSession.getAttribute("user"));
-        } else {
+        if(!passwordEncoder.matches(userEntity.getPassword(), user.getPassword())){
             throw new WrongUsernameAndPasswordException("wrong passowrd");
         }
+
+        log.info("login user: " + userEntity.toString());
+        httpSession.setAttribute("user",user);
+
+        log.info("session id: " + httpSession.getId());
+        log.info("session value: " + httpSession.getAttribute("user"));
+        log.info("get session: " + httpSession.getAttribute("user").toString());
         return user;
     }
 
diff --git a/src/main/java/com/example/oneul/global/error/GlobalExceptionHandler.java b/src/main/java/com/example/oneul/global/error/GlobalExceptionHandler.java
index 0fc6753..14177c4 100644
--- a/src/main/java/com/example/oneul/global/error/GlobalExceptionHandler.java
+++ b/src/main/java/com/example/oneul/global/error/GlobalExceptionHandler.java
@@ -22,7 +22,7 @@ public class GlobalExceptionHandler {
 
     @ExceptionHandler(WrongUsernameAndPasswordException.class)
     protected ResponseEntity<String> handleWrongUsernameAndPasswordException(WrongUsernameAndPasswordException e){
-        log.info("wrong username and password");
-        return new ResponseEntity<>("wrong username and password", HttpStatus.NOT_FOUND);
+        log.info(e.getMessage());
+        return new ResponseEntity<>(e.getMessage(), HttpStatus.NOT_FOUND);
     }
 }
diff --git a/src/test/java/com/example/oneul/service/PostCommandSerivceTest.java b/src/test/java/com/example/oneul/service/PostCommandSerivceTest.java
new file mode 100644
index 0000000..8737575
--- /dev/null
+++ b/src/test/java/com/example/oneul/service/PostCommandSerivceTest.java
@@ -0,0 +1,5 @@
+package com.example.oneul.service;
+
+public class PostCommandSerivceTest {
+    
+}
diff --git a/src/test/java/com/example/oneul/service/UserCommandServiceTest.java b/src/test/java/com/example/oneul/service/UserServiceTest.java
similarity index 97%
rename from src/test/java/com/example/oneul/service/UserCommandServiceTest.java
rename to src/test/java/com/example/oneul/service/UserServiceTest.java
index 12d4499..4c5d4bb 100644
--- a/src/test/java/com/example/oneul/service/UserCommandServiceTest.java
+++ b/src/test/java/com/example/oneul/service/UserServiceTest.java
@@ -19,7 +19,7 @@ import org.testcontainers.junit.jupiter.Testcontainers;
 @Testcontainers
 @SpringBootTest
 @ActiveProfiles("test")
-public class UserCommandServiceTest {
+public class UserServiceTest {
     @Autowired
     private UserService userCommandService;
     @Autowired