diff --git a/.github/workflows/blank.yml b/.github/workflows/blank.yml
new file mode 100644
index 0000000..80229cb
--- /dev/null
+++ b/.github/workflows/blank.yml
@@ -0,0 +1,76 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+# This workflow will build a Java project with Gradle and cache/restore any dependencies to improve the workflow execution time
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-gradle
+
+name: Deployment
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main" ]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Set up JDK 21
+      uses: actions/setup-java@v3
+      with:
+        java-version: '21'
+        distribution: 'temurin'
+    - name: Build with Gradle
+      uses: gradle/gradle-build-action@67421db6bd0bf253fb4bd25b31ebb98943c375e1
+      with:
+        arguments: build
+    - uses: actions/upload-artifact@v3
+      with:
+        name: jar
+        path: build/libs
+        
+  send-jar:
+    needs: build
+    runs-on: ubuntu-latest
+    steps: 
+      - name: Download jar
+        uses: actions/download-artifact@v3
+        with:
+          name: jar
+      - name: Send jar to remote server
+        uses: appleboy/scp-action@master
+        with:
+          host: 34.64.188.42
+          username: kongju8466
+          source: "devlog_springboot-0.0.1-SNAPSHOT.jar"
+          target: "/home/kongju8466"
+          key: ${{ secrets.PRIVATE_KEY }}
+  
+  run-app:
+    needs: send-jar
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Move deploy.sh
+        uses: appleboy/scp-action@master
+        with:
+          host: 34.64.188.42
+          username: kongju8466
+          source: "deploy.sh"
+          target: "/home/kongju8466"
+          key: ${{ secrets.PRIVATE_KEY }}
+      - name: Execute script
+        uses: appleboy/ssh-action@master
+        with:
+          username: kongju8466
+          host: 34.64.188.42
+          key: ${{ secrets.PRIVATE_KEY }}
+          script_stop: true
+          script: cd /home/kongju8466 && chmod +x deploy.sh && ./deploy.sh
diff --git a/read.md b/read.md
new file mode 100644
index 0000000..a82bd16
--- /dev/null
+++ b/read.md
@@ -0,0 +1 @@
+hihihi
diff --git a/src/main/java/com/com/cnu/devlog_springboot/controller/PostController.java b/src/main/java/com/com/cnu/devlog_springboot/controller/PostController.java
index 7d6847f..2b42c3f 100644
--- a/src/main/java/com/com/cnu/devlog_springboot/controller/PostController.java
+++ b/src/main/java/com/com/cnu/devlog_springboot/controller/PostController.java
@@ -3,6 +3,8 @@
 import com.com.cnu.devlog_springboot.model.Post;
 import com.com.cnu.devlog_springboot.model.request.PostRequest;
 import com.com.cnu.devlog_springboot.service.PostService;
+import com.com.cnu.devlog_springboot.type.Tag;
+import jakarta.annotation.Nullable;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
@@ -15,26 +17,25 @@
 public class PostController {
     private final PostService postService;
 
-    // GET /posts
     @GetMapping
-    public ResponseEntity<List<Post>> getPosts() {
-        return ResponseEntity.ok(postService.getPosts());
+    public ResponseEntity<List<Post>> getPosts(@RequestParam("tag") @Nullable Tag tag) {
+        return ResponseEntity.ok(postService.getPosts(tag));
     }
 
-    // GET /posts/{postId}
+    //GET /posts/{postId}
     @GetMapping("{postId}")
     public ResponseEntity<Post> getPost(@PathVariable("postId")Integer postId) {
         return ResponseEntity.ok(postService.getPost(postId));
     }
 
-    // POST /posts
+    //POST /posts
     @PostMapping
     public ResponseEntity<Post> createPost(@RequestBody PostRequest postRequest) {
-        return ResponseEntity.ok(postService.creatPost(postRequest));
+        return ResponseEntity.ok(postService.createPost(postRequest));
     }
 
     // PUT /posts/{postId}
-    // ex. localhost:8080/posts/3
+    // localhost:8080/posts/3
     @PutMapping("{postId}")
     public ResponseEntity<Post> updatePost(
             @PathVariable("postId")Integer postId,
@@ -42,11 +43,11 @@ public ResponseEntity<Post> updatePost(
     ) {
         return ResponseEntity.ok(postService.updatePost(postId, postRequest));
     }
-
-    // DELETE /posts/{postId}
+    // DELETE /posts/{postid}
     @DeleteMapping("{postId}")
     public ResponseEntity<Void> deletePost(@PathVariable("postId") Integer postId) {
         postService.deletePost(postId);
         return ResponseEntity.noContent().build();
     }
+
 }
diff --git a/src/main/java/com/com/cnu/devlog_springboot/controller/ProjectController.java b/src/main/java/com/com/cnu/devlog_springboot/controller/ProjectController.java
new file mode 100644
index 0000000..171bb6c
--- /dev/null
+++ b/src/main/java/com/com/cnu/devlog_springboot/controller/ProjectController.java
@@ -0,0 +1,52 @@
+package com.com.cnu.devlog_springboot.controller;
+
+import com.com.cnu.devlog_springboot.model.Project;
+import com.com.cnu.devlog_springboot.model.request.ProjectRequest;
+import com.com.cnu.devlog_springboot.service.ProjectService;
+import lombok.AllArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/projects")
+@AllArgsConstructor
+public class ProjectController {
+    private final ProjectService projectService;
+
+    @GetMapping
+    public ResponseEntity<List<Project>> getProjects() {
+        return ResponseEntity.ok(projectService.getProjects());
+    }
+
+    // GET /posts/{postId}
+    @GetMapping("{projectId}")
+    public ResponseEntity<Project> getProject(@PathVariable("projectId")Integer projectId) {
+        return ResponseEntity.ok(projectService.getProject(projectId));
+    }
+
+    // POST /posts
+    @PostMapping
+    public ResponseEntity<Project> createProject(@RequestBody ProjectRequest projectRequest) {
+        return ResponseEntity.ok(projectService.createProject(projectRequest));
+    }
+
+    // PUT /posts/{postId}
+    // localhost:8080/posts/3
+    @PutMapping("{projectId}")
+    public ResponseEntity<Project> updateProject(
+            @PathVariable Integer projectId,
+            @RequestBody ProjectRequest projectRequest
+    ) {
+        return ResponseEntity.ok(projectService.updateProject(projectId, projectRequest));
+    }
+
+    // DELETE /posts/{postId}
+    @DeleteMapping("{projectId}")
+    public ResponseEntity<Void> deleteProject(@PathVariable("projectId")Integer projectId) {
+        projectService.deleteProject(projectId);
+        return ResponseEntity.noContent().build();
+    }
+
+}
diff --git a/src/main/java/com/com/cnu/devlog_springboot/exception/DevlogException.java b/src/main/java/com/com/cnu/devlog_springboot/exception/DevlogException.java
new file mode 100644
index 0000000..9da0b4e
--- /dev/null
+++ b/src/main/java/com/com/cnu/devlog_springboot/exception/DevlogException.java
@@ -0,0 +1,11 @@
+package com.com.cnu.devlog_springboot.exception;
+
+import com.com.cnu.devlog_springboot.type.ErrorCode;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class DevlogException extends RuntimeException {
+    private final ErrorCode errorCode;
+}
diff --git a/src/main/java/com/com/cnu/devlog_springboot/exception/GlobalExceptionHandler.java b/src/main/java/com/com/cnu/devlog_springboot/exception/GlobalExceptionHandler.java
new file mode 100644
index 0000000..fc6782a
--- /dev/null
+++ b/src/main/java/com/com/cnu/devlog_springboot/exception/GlobalExceptionHandler.java
@@ -0,0 +1,28 @@
+package com.com.cnu.devlog_springboot.exception;
+
+import com.com.cnu.devlog_springboot.model.response.ErrorResponse;
+import jakarta.servlet.http.HttpServletRequest;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+
+import java.util.Locale;
+
+@ControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(DevlogException.class)
+    public ResponseEntity<ErrorResponse> handleDevlogException(
+            HttpServletRequest request,DevlogException e
+    ) {
+        return ResponseEntity.status(e.getErrorCode().getHttpStatus())
+                .body(
+                        new ErrorResponse(
+                                e.getErrorCode().getDescription(),
+                                e.getErrorCode().getHttpStatus().value(),
+                                e.getErrorCode().getErrorCode(),
+                                request.getRequestURI()
+                        )
+                );
+    }
+}
diff --git a/src/main/java/com/com/cnu/devlog_springboot/model/request/PostRequest.java b/src/main/java/com/com/cnu/devlog_springboot/model/request/PostRequest.java
index 14efa3b..f98f828 100644
--- a/src/main/java/com/com/cnu/devlog_springboot/model/request/PostRequest.java
+++ b/src/main/java/com/com/cnu/devlog_springboot/model/request/PostRequest.java
@@ -4,7 +4,7 @@
 
 public record PostRequest(
         String title,
-        String contents,
+        String content,
         Tag tag
 ) {
 }
diff --git a/src/main/java/com/com/cnu/devlog_springboot/model/response/ErrorResponse.java b/src/main/java/com/com/cnu/devlog_springboot/model/response/ErrorResponse.java
new file mode 100644
index 0000000..c102932
--- /dev/null
+++ b/src/main/java/com/com/cnu/devlog_springboot/model/response/ErrorResponse.java
@@ -0,0 +1,9 @@
+package com.com.cnu.devlog_springboot.model.response;
+
+public record ErrorResponse(
+        String title,
+        Integer status,
+        Integer code,
+        String instance
+) {
+}
diff --git a/src/main/java/com/com/cnu/devlog_springboot/repository/PostRepository.java b/src/main/java/com/com/cnu/devlog_springboot/repository/PostRepository.java
index bb39395..1cc53d6 100644
--- a/src/main/java/com/com/cnu/devlog_springboot/repository/PostRepository.java
+++ b/src/main/java/com/com/cnu/devlog_springboot/repository/PostRepository.java
@@ -1,13 +1,17 @@
 package com.com.cnu.devlog_springboot.repository;
 
 import com.com.cnu.devlog_springboot.model.Post;
+import com.com.cnu.devlog_springboot.type.Tag;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
+
 @Repository
 public interface PostRepository extends JpaRepository<Post, Integer> {
 //    Post save(Post post);
 //    List<Post> findAll();
 //    Optional<Post> findById(Integer postId);
 //    void delete(Post post);
+    List<Post> findAllByTag(Tag tag);
 }
diff --git a/src/main/java/com/com/cnu/devlog_springboot/repository/ProjectRepository.java b/src/main/java/com/com/cnu/devlog_springboot/repository/ProjectRepository.java
new file mode 100644
index 0000000..4dfb1ca
--- /dev/null
+++ b/src/main/java/com/com/cnu/devlog_springboot/repository/ProjectRepository.java
@@ -0,0 +1,11 @@
+package com.com.cnu.devlog_springboot.repository;
+
+import com.com.cnu.devlog_springboot.model.Project;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@Repository
+public interface ProjectRepository extends JpaRepository<Project, Integer> {
+}
\ No newline at end of file
diff --git a/src/main/java/com/com/cnu/devlog_springboot/service/PostService.java b/src/main/java/com/com/cnu/devlog_springboot/service/PostService.java
index 3823d7a..5d7b198 100644
--- a/src/main/java/com/com/cnu/devlog_springboot/service/PostService.java
+++ b/src/main/java/com/com/cnu/devlog_springboot/service/PostService.java
@@ -1,8 +1,12 @@
 package com.com.cnu.devlog_springboot.service;
 
+import com.com.cnu.devlog_springboot.exception.DevlogException;
 import com.com.cnu.devlog_springboot.model.Post;
 import com.com.cnu.devlog_springboot.model.request.PostRequest;
 import com.com.cnu.devlog_springboot.repository.PostRepository;
+import com.com.cnu.devlog_springboot.type.ErrorCode;
+import com.com.cnu.devlog_springboot.type.Tag;
+import jakarta.annotation.Nullable;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
@@ -13,15 +17,18 @@
 public class PostService {
     private final PostRepository postRepository;
 
-    public List<Post> getPosts() {
+    public List<Post> getPosts(@Nullable Tag tag) {
+        if (tag != null) {
+            return postRepository.findAllByTag(tag);
+        }
         return postRepository.findAll();
     }
 
-    public Post creatPost(PostRequest postRequest) {
+    public Post createPost(PostRequest postRequest) {
         return postRepository.save(new Post(
                 null,
                 postRequest.title(),
-                postRequest.contents(),
+                postRequest.content(),
                 postRequest.tag()
         ));
     }
@@ -30,7 +37,7 @@ public Post updatePost(Integer postId, PostRequest postRequest) {
         return postRepository.findById(postId)
                 .map(post -> {
                     post.setTitle(postRequest.title());
-                    post.setContents(postRequest.contents());
+                    post.setContents(postRequest.content());
                     return postRepository.save(post);
                 })
                 .orElse(null);
@@ -38,7 +45,7 @@ public Post updatePost(Integer postId, PostRequest postRequest) {
 
     public Post getPost(Integer postId) {
         return postRepository.findById(postId)
-                .orElse(null);
+                .orElseThrow(() -> new DevlogException(ErrorCode.POST_NOT_FOUND));
     }
 
     public void deletePost(Integer postId) {
diff --git a/src/main/java/com/com/cnu/devlog_springboot/service/ProjectService.java b/src/main/java/com/com/cnu/devlog_springboot/service/ProjectService.java
new file mode 100644
index 0000000..bb1d672
--- /dev/null
+++ b/src/main/java/com/com/cnu/devlog_springboot/service/ProjectService.java
@@ -0,0 +1,55 @@
+package com.com.cnu.devlog_springboot.service;
+
+import com.com.cnu.devlog_springboot.exception.DevlogException;
+import com.com.cnu.devlog_springboot.model.Project;
+import com.com.cnu.devlog_springboot.model.request.ProjectRequest;
+import com.com.cnu.devlog_springboot.repository.ProjectRepository;
+import com.com.cnu.devlog_springboot.type.ErrorCode;
+import lombok.AllArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+@Service
+@AllArgsConstructor
+public class ProjectService {
+    private final ProjectRepository projectRepository;
+
+    public List<Project> getProjects() {
+        return projectRepository.findAll();
+    }
+
+    public Project createProject(ProjectRequest projectRequest) {
+        return projectRepository.save(
+                new Project(
+                        null,
+                        projectRequest.title(),
+                        projectRequest.summary(),
+                        projectRequest.contents(),
+                        projectRequest.startDate(),
+                        projectRequest.endDate()
+                )
+        );
+    }
+
+    public Project updateProject(Integer projectId, ProjectRequest projectRequest) {
+        return projectRepository.findById(projectId)
+                .map(project -> {
+                    project.setTitle(projectRequest.title());
+                    project.setContents(projectRequest.contents());
+                    project.setSummary(projectRequest.summary());
+                    project.setStartDate(projectRequest.startDate());
+                    project.setEndDate(projectRequest.endDate());
+                    return projectRepository.save(project);
+                }).orElseThrow(() -> new DevlogException(ErrorCode.PROJECT_NOT_FOUND));
+    }
+
+    public Project getProject(Integer projectId) {
+        return projectRepository.findById(projectId)
+                .orElseThrow(() -> new DevlogException(ErrorCode.PROJECT_NOT_FOUND));
+    }
+
+    public void deleteProject(Integer projectId) {
+        projectRepository.findById(projectId)
+                .ifPresent(projectRepository::delete);
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/com/cnu/devlog_springboot/type/ErrorCode.java b/src/main/java/com/com/cnu/devlog_springboot/type/ErrorCode.java
new file mode 100644
index 0000000..d0e06d4
--- /dev/null
+++ b/src/main/java/com/com/cnu/devlog_springboot/type/ErrorCode.java
@@ -0,0 +1,20 @@
+package com.com.cnu.devlog_springboot.type;
+
+import lombok.Getter;
+import org.springframework.http.HttpStatus;
+
+@Getter
+public enum ErrorCode {
+    // 4xx
+    POST_NOT_FOUND(HttpStatus.NOT_FOUND, 4000,"해당 게시글을 찾을 수 없습니다."),
+    PROJECT_NOT_FOUND(HttpStatus.NOT_FOUND, 4001,"해당 프로젝트를 찾을 수 없습니다.");
+    private final HttpStatus httpStatus;
+    private final Integer errorCode;
+    private final String description;
+
+    ErrorCode(HttpStatus httpStatus, Integer errorCode, String description) {
+        this.httpStatus = httpStatus;
+        this.errorCode = errorCode;
+        this.description = description;
+    }
+}