diff --git a/.github/ISSUE_TEMPLATE/refact_request.md b/.github/ISSUE_TEMPLATE/refact_request.md
new file mode 100644
index 0000000..65b132b
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/refact_request.md
@@ -0,0 +1,16 @@
+---
+name: "Refact Report"
+about: 버그 리포트를 작성할 때 사용하는 템플릿입니다.
+title: "[REFACT] "
+labels: "refact"
+assignees: ''
+---
+
+### 🔬 재현 절차
+1. ...
+2. ...
+3. ...
+
+### 🤔 예상 결과
+### 💻 환경
+- **OS:** - **Browser:**
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 14746e7..2a65317 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
diff --git a/src/main/java/mission/controller/HomeController.java b/src/main/java/mission/controller/HomeController.java
deleted file mode 100644
index 4b578de..0000000
--- a/src/main/java/mission/controller/HomeController.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package mission.controller;
-
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@RestController
-public class HomeController {
-    @GetMapping("/ping")
-    public String ping() {
-        return "ok";
-    }
-}
diff --git a/src/main/java/mission/post/PostController.java b/src/main/java/mission/post/PostController.java
deleted file mode 100644
index 3ec5956..0000000
--- a/src/main/java/mission/post/PostController.java
+++ /dev/null
@@ -1,36 +0,0 @@
-package mission.post;
-
-import jakarta.validation.Valid;
-import lombok.RequiredArgsConstructor;
-import mission.post.dto.CreatePostRequest;
-import mission.post.dto.PostCreateResponse;
-import mission.post.dto.UpdatePostRequest;
-import org.springframework.http.HttpStatus;
-import org.springframework.web.bind.annotation.*;
-
-import java.util.Map;
-
-@RestController
-@RequestMapping("/api/posts")
-@RequiredArgsConstructor
-public class PostController {
-    private final PostService postService;
-
-    @PostMapping
-    public PostCreateResponse create(@RequestBody @Valid CreatePostRequest createPostRequest) {
-        return postService.create(createPostRequest);
-    }
-
-    @PutMapping("/{id}")
-    public PostCreateResponse update(@PathVariable Long id, @RequestBody @Valid UpdatePostRequest updatePostRequest) {
-        return postService.update(id, updatePostRequest);
-    }
-
-    @DeleteMapping("/{id}")
-    @ResponseStatus(HttpStatus.NO_CONTENT)
-    public void delete(@PathVariable Long id, @RequestBody Map<String, String> body) {
-        String email = body.get("email");
-        String password = body.get("password");
-        postService.delete(id, email, password);
-    }
-}
diff --git a/src/main/java/mission/post/PostService.java b/src/main/java/mission/post/PostService.java
deleted file mode 100644
index 2c42b9e..0000000
--- a/src/main/java/mission/post/PostService.java
+++ /dev/null
@@ -1,67 +0,0 @@
-package mission.post;
-
-import jakarta.transaction.Transactional;
-import lombok.RequiredArgsConstructor;
-import mission.post.dto.CreatePostRequest;
-import mission.post.dto.PostCreateResponse;
-import mission.post.dto.UpdatePostRequest;
-import mission.user.User;
-import mission.user.UserRepository;
-import org.springframework.security.crypto.bcrypt.BCrypt;
-import org.springframework.stereotype.Service;
-
-@Service
-@RequiredArgsConstructor
-public class PostService {
-    private final PostRepository postRepository;
-    private final UserRepository userRepository;
-
-    @Transactional
-    public PostCreateResponse create(CreatePostRequest createPostRequest) {
-        User author = userRepository.findByEmail(createPostRequest.email())
-                .orElseThrow(()->new IllegalArgumentException("email or password not found"));
-        if (!BCrypt.checkpw(createPostRequest.password(), author.getPasswordHash()))
-            throw new IllegalArgumentException("email or password does not match");
-
-        Post saved = postRepository.save(
-                Post.builder()
-                        .title(createPostRequest.title())
-                        .content(createPostRequest.content())
-                        .author(author)
-                        .build()
-        );
-
-        return new PostCreateResponse(saved.getId(), author.getEmail(), saved.getTitle(), saved.getContent());
-    }
-
-    @Transactional
-    public PostCreateResponse update(Long id, UpdatePostRequest updatePostRequeset){
-        Post post = postRepository.findById(id)
-                .orElseThrow(()->new IllegalArgumentException("post not found"));
-
-        if(!post.getAuthor().getEmail().equals(updatePostRequeset.email()) || !BCrypt.checkpw(updatePostRequeset.password(), post.getAuthor().getPasswordHash())){
-            throw new IllegalArgumentException("email or password does not match");
-        }
-
-        post.edit(updatePostRequeset.title(), updatePostRequeset.content());
-
-        return new PostCreateResponse(
-                post.getId(),
-                post.getAuthor().getEmail(),
-                post.getTitle(),
-                post.getContent()
-        );
-    }
-
-    @Transactional
-    public void delete(Long id, String email, String password){
-        Post post = postRepository.findById(id)
-                .orElseThrow(()->new IllegalArgumentException("post not found"));
-
-        if(!post.getAuthor().getEmail().equals(email) || !BCrypt.checkpw(password, post.getAuthor().getPasswordHash())){
-            throw new IllegalArgumentException("email or password does not match");
-        }
-
-        postRepository.delete(post);
-    }
-}
diff --git a/src/main/java/mission/post/application/PostController.java b/src/main/java/mission/post/application/PostController.java
new file mode 100644
index 0000000..c29ff5b
--- /dev/null
+++ b/src/main/java/mission/post/application/PostController.java
@@ -0,0 +1,44 @@
+package mission.post.application;
+
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import mission.post.business.PostService;
+import mission.post.application.dto.CreatePostRequest;
+import mission.post.application.dto.PostCreateResponse;
+import mission.post.application.dto.UpdatePostRequest;
+import mission.post.business.command.CreatePostCommand;
+import mission.post.business.command.UpdatePostCommand;
+import mission.post.business.result.PostResult;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.Map;
+
+@RestController
+@RequestMapping("/api/posts")
+@RequiredArgsConstructor
+public class PostController {
+    private final PostService postService;
+
+    @PostMapping
+    public PostCreateResponse create(@RequestBody @Valid CreatePostRequest req) {
+        var cmd = new CreatePostCommand(req.email(), req.password(), req.title(), req.content());
+        PostResult result = postService.create(cmd);
+        return new PostCreateResponse(result.articleId(), result.email(), result.title(), result.content());
+    }
+
+    @PutMapping("/{id}")
+    public PostCreateResponse update(@PathVariable Long id, @RequestBody @Valid UpdatePostRequest req) {
+        var cmd = new UpdatePostCommand(id, req.email(), req.password(), req.title(), req.content());
+        PostResult result = postService.update(cmd);
+        return new PostCreateResponse(result.articleId(), result.email(), result.title(), result.content());
+    }
+
+    @DeleteMapping("/{id}")
+    @ResponseStatus(HttpStatus.NO_CONTENT)
+    public void delete(@PathVariable Long id, @RequestBody Map<String, String> body) {
+        String email = body.get("email");
+        String password = body.get("password");
+        postService.delete(id, email, password);
+    }
+}
diff --git a/src/main/java/mission/post/dto/CreatePostRequest.java b/src/main/java/mission/post/application/dto/CreatePostRequest.java
similarity index 83%
rename from src/main/java/mission/post/dto/CreatePostRequest.java
rename to src/main/java/mission/post/application/dto/CreatePostRequest.java
index e1a1179..b29acf3 100644
--- a/src/main/java/mission/post/dto/CreatePostRequest.java
+++ b/src/main/java/mission/post/application/dto/CreatePostRequest.java
@@ -1,4 +1,4 @@
-package mission.post.dto;
+package mission.post.application.dto;
 
 import jakarta.validation.constraints.NotBlank;
 
diff --git a/src/main/java/mission/post/dto/PostCreateResponse.java b/src/main/java/mission/post/application/dto/PostCreateResponse.java
similarity index 77%
rename from src/main/java/mission/post/dto/PostCreateResponse.java
rename to src/main/java/mission/post/application/dto/PostCreateResponse.java
index edacb03..f5f7f1f 100644
--- a/src/main/java/mission/post/dto/PostCreateResponse.java
+++ b/src/main/java/mission/post/application/dto/PostCreateResponse.java
@@ -1,4 +1,4 @@
-package mission.post.dto;
+package mission.post.application.dto;
 
 public record PostCreateResponse(
         Long articleId,
diff --git a/src/main/java/mission/post/dto/UpdatePostRequest.java b/src/main/java/mission/post/application/dto/UpdatePostRequest.java
similarity index 84%
rename from src/main/java/mission/post/dto/UpdatePostRequest.java
rename to src/main/java/mission/post/application/dto/UpdatePostRequest.java
index b5d8091..fc44e8c 100644
--- a/src/main/java/mission/post/dto/UpdatePostRequest.java
+++ b/src/main/java/mission/post/application/dto/UpdatePostRequest.java
@@ -1,4 +1,4 @@
-package mission.post.dto;
+package mission.post.application.dto;
 
 import jakarta.validation.constraints.NotBlank;
 
diff --git a/src/main/java/mission/post/business/PostService.java b/src/main/java/mission/post/business/PostService.java
new file mode 100644
index 0000000..95255d3
--- /dev/null
+++ b/src/main/java/mission/post/business/PostService.java
@@ -0,0 +1,61 @@
+package mission.post.business;
+
+import jakarta.transaction.Transactional;
+import lombok.RequiredArgsConstructor;
+import mission.post.business.command.CreatePostCommand;
+import mission.post.business.command.UpdatePostCommand;
+import mission.post.business.result.PostResult;
+import mission.post.domain.Post;
+import mission.post.implement.PostReader;
+import mission.post.implement.PostWriter;
+import mission.user.domain.User;
+import mission.user.implement.AuthVerifier;
+import mission.user.implement.UserReader;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class PostService {
+    private final PostReader postReader;
+    private final PostWriter postWriter;
+    private final UserReader userReader;
+    private final AuthVerifier authVerifier;
+
+    @Transactional
+    public PostResult create(CreatePostCommand createPostCommand) {
+        User author = userReader.getByEmail(createPostCommand.email());
+        authVerifier.verifyUserEmailAndPassword(author, createPostCommand.email(), createPostCommand.password());
+
+        Post saved = postWriter.save(
+                Post.builder()
+                        .title(createPostCommand.title())
+                        .content(createPostCommand.content())
+                        .author(author)
+                        .build()
+        );
+
+        return new PostResult(saved.getId(), saved.getAuthor().getEmail(), saved.getTitle(), saved.getContent());
+    }
+
+    @Transactional
+    public PostResult update(UpdatePostCommand updatePostCommand) {
+        Post post = postReader.getById(updatePostCommand.id());
+        authVerifier.verifyUserEmailAndPassword(post.getAuthor(), updatePostCommand.email(), updatePostCommand.password());
+        post.edit(updatePostCommand.title(), updatePostCommand.content());
+
+        return new PostResult(
+                post.getId(),
+                post.getAuthor().getEmail(),
+                post.getTitle(),
+                post.getContent()
+        );
+    }
+    @Transactional
+    public void delete(Long id, String email, String password){
+        Post post = postReader.getById(id);
+
+        authVerifier.verifyUserEmailAndPassword(post.getAuthor(), email, password);
+
+        postWriter.delete(post);
+    }
+}
diff --git a/src/main/java/mission/post/business/command/CreatePostCommand.java b/src/main/java/mission/post/business/command/CreatePostCommand.java
new file mode 100644
index 0000000..e557af1
--- /dev/null
+++ b/src/main/java/mission/post/business/command/CreatePostCommand.java
@@ -0,0 +1,13 @@
+package mission.post.business.command;
+
+public record CreatePostCommand (
+    String email,
+    String password,
+    String title,
+    String content
+) {
+    public CreatePostCommand {
+        if (title == null || title.isBlank()) throw new IllegalArgumentException("title is null or empty");
+        if (content == null || content.isBlank()) throw new IllegalArgumentException("content is null or empty");
+    }
+}
diff --git a/src/main/java/mission/post/business/command/UpdatePostCommand.java b/src/main/java/mission/post/business/command/UpdatePostCommand.java
new file mode 100644
index 0000000..46aeba6
--- /dev/null
+++ b/src/main/java/mission/post/business/command/UpdatePostCommand.java
@@ -0,0 +1,15 @@
+package mission.post.business.command;
+
+public record UpdatePostCommand(
+        Long id,
+        String email,
+        String password,
+        String title,
+        String content
+) {
+    public UpdatePostCommand{
+        if(id==null) throw new IllegalArgumentException("id is null");
+        if(title==null || title.isBlank()) throw new IllegalArgumentException("title is null or empty");
+        if(content==null || content.isBlank()) throw new IllegalArgumentException("content is null or empty");
+    }
+}
diff --git a/src/main/java/mission/post/business/result/PostResult.java b/src/main/java/mission/post/business/result/PostResult.java
new file mode 100644
index 0000000..0c13b82
--- /dev/null
+++ b/src/main/java/mission/post/business/result/PostResult.java
@@ -0,0 +1,9 @@
+package mission.post.business.result;
+
+public record PostResult(
+        Long articleId,
+        String email,
+        String title,
+        String content
+) {
+}
diff --git a/src/main/java/mission/post/Post.java b/src/main/java/mission/post/domain/Post.java
similarity index 91%
rename from src/main/java/mission/post/Post.java
rename to src/main/java/mission/post/domain/Post.java
index c24f765..99e9e51 100644
--- a/src/main/java/mission/post/Post.java
+++ b/src/main/java/mission/post/domain/Post.java
@@ -1,9 +1,9 @@
-package mission.post;
+package mission.post.domain;
 
 import jakarta.persistence.*;
 import jakarta.validation.constraints.NotBlank;
 import lombok.*;
-import mission.user.User;
+import mission.user.domain.User;
 
 @Entity
 @Table(name = "post")
diff --git a/src/main/java/mission/post/implement/PostReader.java b/src/main/java/mission/post/implement/PostReader.java
new file mode 100644
index 0000000..f79e221
--- /dev/null
+++ b/src/main/java/mission/post/implement/PostReader.java
@@ -0,0 +1,18 @@
+package mission.post.implement;
+
+
+import lombok.RequiredArgsConstructor;
+import mission.post.domain.Post;
+import mission.post.repository.PostRepository;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class PostReader {
+    private final PostRepository postRepository;
+
+    public Post getById(Long id) {
+        return postRepository.findById(id)
+                .orElseThrow(()->new IllegalArgumentException("post not found"));
+    }
+}
diff --git a/src/main/java/mission/post/implement/PostWriter.java b/src/main/java/mission/post/implement/PostWriter.java
new file mode 100644
index 0000000..6646ce7
--- /dev/null
+++ b/src/main/java/mission/post/implement/PostWriter.java
@@ -0,0 +1,16 @@
+package mission.post.implement;
+
+import lombok.RequiredArgsConstructor;
+import mission.post.domain.Post;
+import mission.post.repository.PostRepository;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class PostWriter {
+    private final PostRepository postRepository;
+
+    public Post save(Post post){return postRepository.save(post);}
+    public void delete(Post post){postRepository.delete(post);}
+
+}
diff --git a/src/main/java/mission/post/PostRepository.java b/src/main/java/mission/post/repository/PostRepository.java
similarity index 66%
rename from src/main/java/mission/post/PostRepository.java
rename to src/main/java/mission/post/repository/PostRepository.java
index bd9c4ca..81d03cd 100644
--- a/src/main/java/mission/post/PostRepository.java
+++ b/src/main/java/mission/post/repository/PostRepository.java
@@ -1,5 +1,6 @@
-package mission.post;
+package mission.post.repository;
 
+import mission.post.domain.Post;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface PostRepository extends JpaRepository<Post, Long> {
diff --git a/src/main/java/mission/user/UserController.java b/src/main/java/mission/user/UserController.java
deleted file mode 100644
index 627d35f..0000000
--- a/src/main/java/mission/user/UserController.java
+++ /dev/null
@@ -1,22 +0,0 @@
-package mission.user;
-
-import lombok.RequiredArgsConstructor;
-import mission.user.dto.SignUpRequest;
-import mission.user.dto.SignUpResponse;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@RestController
-@RequestMapping("/api/users")
-@RequiredArgsConstructor
-public class UserController {
-
-    private final UserService userService;
-
-    @PostMapping("/signup")
-    public SignUpResponse signup(@RequestBody SignUpRequest request){
-        return userService.signup(request);
-    }
-}
diff --git a/src/main/java/mission/user/application/UserController.java b/src/main/java/mission/user/application/UserController.java
new file mode 100644
index 0000000..e1aaf55
--- /dev/null
+++ b/src/main/java/mission/user/application/UserController.java
@@ -0,0 +1,27 @@
+package mission.user.application;
+
+import lombok.RequiredArgsConstructor;
+import mission.user.business.UserService;
+import mission.user.application.dto.SignUpRequest;
+import mission.user.application.dto.SignUpResponse;
+import mission.user.business.command.SignUpCommand;
+import mission.user.business.result.SignUpResult;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/users")
+@RequiredArgsConstructor
+public class UserController {
+
+    private final UserService userService;
+
+    @PostMapping("/signup")
+    public SignUpResponse signup(@RequestBody SignUpRequest req) {
+        var cmd = new SignUpCommand(req.email(), req.password(), req.username());
+        SignUpResult result = userService.signup(cmd);
+        return new SignUpResponse(result.email(), result.username());
+    }
+}
diff --git a/src/main/java/mission/user/dto/SignUpRequest.java b/src/main/java/mission/user/application/dto/SignUpRequest.java
similarity index 67%
rename from src/main/java/mission/user/dto/SignUpRequest.java
rename to src/main/java/mission/user/application/dto/SignUpRequest.java
index 5712e94..ae486d4 100644
--- a/src/main/java/mission/user/dto/SignUpRequest.java
+++ b/src/main/java/mission/user/application/dto/SignUpRequest.java
@@ -1,3 +1,3 @@
-package mission.user.dto;
+package mission.user.application.dto;
 
 public record SignUpRequest(String email, String password, String username) {}
diff --git a/src/main/java/mission/user/dto/SignUpResponse.java b/src/main/java/mission/user/application/dto/SignUpResponse.java
similarity index 63%
rename from src/main/java/mission/user/dto/SignUpResponse.java
rename to src/main/java/mission/user/application/dto/SignUpResponse.java
index c6b4b8f..181a612 100644
--- a/src/main/java/mission/user/dto/SignUpResponse.java
+++ b/src/main/java/mission/user/application/dto/SignUpResponse.java
@@ -1,4 +1,4 @@
-package mission.user.dto;
+package mission.user.application.dto;
 
 
 public record SignUpResponse(String email, String username) {}
diff --git a/src/main/java/mission/user/UserService.java b/src/main/java/mission/user/business/UserService.java
similarity index 50%
rename from src/main/java/mission/user/UserService.java
rename to src/main/java/mission/user/business/UserService.java
index e044b91..4da116f 100644
--- a/src/main/java/mission/user/UserService.java
+++ b/src/main/java/mission/user/business/UserService.java
@@ -1,9 +1,11 @@
-package mission.user;
+package mission.user.business;
 
 import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
-import mission.user.dto.SignUpRequest;
-import mission.user.dto.SignUpResponse;
+import mission.user.business.command.SignUpCommand;
+import mission.user.business.result.SignUpResult;
+import mission.user.domain.User;
+import mission.user.repository.UserRepository;
 import org.springframework.security.crypto.bcrypt.BCrypt;
 import org.springframework.stereotype.Service;
 
@@ -13,19 +15,19 @@ public class UserService {
     private final UserRepository userRepository;
 
     @Transactional
-    public SignUpResponse signup(SignUpRequest signUpRequest) {
-        if(userRepository.existsByEmail(signUpRequest.email())){
+    public SignUpResult signup(SignUpCommand signUpCommand) {
+        if(userRepository.existsByEmail(signUpCommand.email())){
             throw new IllegalArgumentException("email already in use");
         }
 
-        String hashedPassword = BCrypt.hashpw(signUpRequest.password(), BCrypt.gensalt());
+        String hashedPassword = BCrypt.hashpw(signUpCommand.password(), BCrypt.gensalt());
         User saved = userRepository.save(
                 User.builder()
-                        .email(signUpRequest.email())
+                        .email(signUpCommand.email())
                         .passwordHash(hashedPassword)
-                        .username(signUpRequest.username())
+                        .username(signUpCommand.username())
                         .build()
         );
-        return new SignUpResponse(saved.getEmail(), saved.getUsername());
+        return new SignUpResult(saved.getEmail(), saved.getUsername());
     }
 }
diff --git a/src/main/java/mission/user/business/command/SignUpCommand.java b/src/main/java/mission/user/business/command/SignUpCommand.java
new file mode 100644
index 0000000..52c82a2
--- /dev/null
+++ b/src/main/java/mission/user/business/command/SignUpCommand.java
@@ -0,0 +1,13 @@
+package mission.user.business.command;
+
+public record SignUpCommand(
+        String email,
+        String password,
+        String username
+) {
+    public SignUpCommand {
+        if(email==null || email.isBlank()) throw new IllegalArgumentException("email is null or empty");
+        if(password==null || password.isBlank()) throw new IllegalArgumentException("password is null or empty");
+        if(username==null || username.isBlank()) throw new IllegalArgumentException("username is null or empty");
+    }
+}
diff --git a/src/main/java/mission/user/business/result/SignUpResult.java b/src/main/java/mission/user/business/result/SignUpResult.java
new file mode 100644
index 0000000..dad67d3
--- /dev/null
+++ b/src/main/java/mission/user/business/result/SignUpResult.java
@@ -0,0 +1,6 @@
+package mission.user.business.result;
+
+public record SignUpResult(
+        String email,
+        String username
+) {}
diff --git a/src/main/java/mission/user/User.java b/src/main/java/mission/user/domain/User.java
similarity index 95%
rename from src/main/java/mission/user/User.java
rename to src/main/java/mission/user/domain/User.java
index 062f9b6..a7ece49 100644
--- a/src/main/java/mission/user/User.java
+++ b/src/main/java/mission/user/domain/User.java
@@ -1,4 +1,4 @@
-package mission.user;
+package mission.user.domain;
 
 import jakarta.persistence.*;
 import jakarta.validation.constraints.Email;
diff --git a/src/main/java/mission/user/implement/AuthVerifier.java b/src/main/java/mission/user/implement/AuthVerifier.java
new file mode 100644
index 0000000..74d21da
--- /dev/null
+++ b/src/main/java/mission/user/implement/AuthVerifier.java
@@ -0,0 +1,18 @@
+package mission.user.implement;
+
+import mission.user.domain.User;
+import org.springframework.security.crypto.bcrypt.BCrypt;
+import org.springframework.stereotype.Component;
+
+@Component
+public class AuthVerifier {
+    public void verifyUserEmailAndPassword(User user, String email, String password){
+        if (user == null || email == null || password == null) {
+            throw new IllegalArgumentException("email or password not found");
+        }
+        boolean ok = user.getEmail().equals(email) && BCrypt.checkpw(password, user.getPasswordHash());
+        if (!ok) {
+            throw new IllegalArgumentException("email or password does not match");
+        }
+    }
+}
diff --git a/src/main/java/mission/user/implement/UserReader.java b/src/main/java/mission/user/implement/UserReader.java
new file mode 100644
index 0000000..31e4fb0
--- /dev/null
+++ b/src/main/java/mission/user/implement/UserReader.java
@@ -0,0 +1,17 @@
+package mission.user.implement;
+
+import lombok.RequiredArgsConstructor;
+import mission.user.domain.User;
+import mission.user.repository.UserRepository;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class UserReader {
+    private final UserRepository userRepository;
+
+    public User getByEmail(String email){
+        return userRepository.findByEmail(email)
+                .orElseThrow(()->new IllegalArgumentException("email not found"));
+    }
+}
diff --git a/src/main/java/mission/user/UserRepository.java b/src/main/java/mission/user/repository/UserRepository.java
similarity index 78%
rename from src/main/java/mission/user/UserRepository.java
rename to src/main/java/mission/user/repository/UserRepository.java
index e15b698..e3d979a 100644
--- a/src/main/java/mission/user/UserRepository.java
+++ b/src/main/java/mission/user/repository/UserRepository.java
@@ -1,5 +1,6 @@
-package mission.user;
+package mission.user.repository;
 
+import mission.user.domain.User;
 import org.springframework.data.jpa.repository.JpaRepository;
 import java.util.Optional;