diff --git a/Admin/src/main/java/com/seveneleven/project/dto/PatchAuthorization.java b/Admin/src/main/java/com/seveneleven/project/dto/PatchAuthorization.java
index 036c286f..8cc4ed0a 100644
--- a/Admin/src/main/java/com/seveneleven/project/dto/PatchAuthorization.java
+++ b/Admin/src/main/java/com/seveneleven/project/dto/PatchAuthorization.java
@@ -3,6 +3,7 @@
 import com.seveneleven.entity.member.Member;
 import com.seveneleven.entity.project.Project;
 import com.seveneleven.entity.project.ProjectAuthorization;
+import com.seveneleven.entity.project.constant.Authorization;
 import com.seveneleven.entity.project.constant.MemberType;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
@@ -19,7 +20,7 @@ public static abstract class BaseMemberAuthorization implements MemberAuthorizat
         protected Long memberId;
         protected String memberName;
         protected MemberType memberType;
-        protected String projectAuthorization;
+        protected Authorization projectAuthorization;
 
         public abstract ProjectAuthorization toEntity(Project project, Member member);
 
diff --git a/Admin/src/main/java/com/seveneleven/project/dto/PutProject.java b/Admin/src/main/java/com/seveneleven/project/dto/PutProject.java
index f59ca4c6..a01e134d 100644
--- a/Admin/src/main/java/com/seveneleven/project/dto/PutProject.java
+++ b/Admin/src/main/java/com/seveneleven/project/dto/PutProject.java
@@ -29,7 +29,6 @@ public static class Request {
         private Long projectTypeId; // 프로젝트 유형 ID
         private ProjectStatusCode projectStatusCode; //
         private String bnsManager; // BNS 담당자 ID (Member 엔티티의 ID)
-        private String contractNumber; // 계약서 번호
         private LocalDate plannedStartDate; // 시작 예정일
         private LocalDate plannedEndDate; // 종료 예정일
         private LocalDate startDate; // 시작일
@@ -54,7 +53,6 @@ public Project updateProject(
                     projectName,
                     projectDescription,
                     projectStatusCode,
-                    contractNumber,
                     plannedStartDate,
                     plannedEndDate,
                     startDate,
@@ -76,7 +74,6 @@ public static class Response {
         private String projectType; // 프로젝트 유형 ID
         private ProjectStatusCode projectStatusCode; //
         private String bnsManager; // BNS 담당자 ID (Member 엔티티의 ID)
-        private String contractNumber; // 계약서 번호
         private LocalDate plannedStartDate; // 시작 예정일
         private LocalDate plannedEndDate; // 종료 예정일
         private LocalDate startDate; // 시작일
@@ -101,7 +98,6 @@ private Response(Project project, List<ProjectTag> tags, List<ProjectAuthorizati
             projectDescription = project.getProjectDescription();
             projectType = project.getProjectType().getProjectTypeName();
             bnsManager = project.getBnsManager();
-            contractNumber = project.getContractNumber();
             plannedStartDate = project.getPlannedStartDate();
             plannedEndDate = project.getPlannedEndDate();
             startDate = project.getStartDate(); // 시작일
diff --git a/Admin/src/main/java/com/seveneleven/project/repository/AdminProjectTagRepository.java b/Admin/src/main/java/com/seveneleven/project/repository/AdminProjectTagRepository.java
index ee5237e3..1508d399 100644
--- a/Admin/src/main/java/com/seveneleven/project/repository/AdminProjectTagRepository.java
+++ b/Admin/src/main/java/com/seveneleven/project/repository/AdminProjectTagRepository.java
@@ -10,4 +10,6 @@
 @Repository
 public interface AdminProjectTagRepository extends JpaRepository<ProjectTag, Long> {
     List<ProjectTag> findByProjectIdAndIsActive(Long projectId, YesNo isActive);
+
+
 }
diff --git a/Admin/src/main/java/com/seveneleven/project/service/AdminProjectTagServiceImpl.java b/Admin/src/main/java/com/seveneleven/project/service/AdminProjectTagServiceImpl.java
index 79d2885a..0ee4fd27 100644
--- a/Admin/src/main/java/com/seveneleven/project/service/AdminProjectTagServiceImpl.java
+++ b/Admin/src/main/java/com/seveneleven/project/service/AdminProjectTagServiceImpl.java
@@ -12,7 +12,7 @@
 public class AdminProjectTagServiceImpl implements AdminProjectTagService {
 
     private final ProjectTagReader projectTagReader;
-    private final AdminProjectTagStore adminProjectTagStore;
+    private final AdminProjectTagStore projectTagStore;
 
     @Override
     public List<ProjectTag> getAllProjectTags(Long projectId) {
@@ -21,6 +21,7 @@ public List<ProjectTag> getAllProjectTags(Long projectId) {
 
     @Override
     public List<ProjectTag> storeProjectTags(Project project, List<String> tags) {
-        return adminProjectTagStore.store(project, tags);
+        List<ProjectTag> projectTags = projectTagReader.readByProjectId(project.getId());
+        return projectTagStore.store(project, tags, projectTags);
     }
 }
diff --git a/Admin/src/main/java/com/seveneleven/project/service/AdminProjectTagStore.java b/Admin/src/main/java/com/seveneleven/project/service/AdminProjectTagStore.java
index 59b4b263..02faa679 100644
--- a/Admin/src/main/java/com/seveneleven/project/service/AdminProjectTagStore.java
+++ b/Admin/src/main/java/com/seveneleven/project/service/AdminProjectTagStore.java
@@ -6,5 +6,5 @@
 import java.util.List;
 
 public interface AdminProjectTagStore {
-    List<ProjectTag> store(Project project, List<String> tags);
+    List<ProjectTag> store(Project project, List<String> tags, List<ProjectTag> projectTags);
 }
diff --git a/Admin/src/main/java/com/seveneleven/project/service/AdminProjectTagStoreImpl.java b/Admin/src/main/java/com/seveneleven/project/service/AdminProjectTagStoreImpl.java
index 4a5644fa..c3c3c9b6 100644
--- a/Admin/src/main/java/com/seveneleven/project/service/AdminProjectTagStoreImpl.java
+++ b/Admin/src/main/java/com/seveneleven/project/service/AdminProjectTagStoreImpl.java
@@ -15,11 +15,14 @@ public class AdminProjectTagStoreImpl implements AdminProjectTagStore {
     private final AdminProjectTagRepository projectTagRepository;
 
     @Override
-    public List<ProjectTag> store(Project project, List<String> tagNameList) {
+    public List<ProjectTag> store(Project project, List<String> tagNameList, List<ProjectTag> projectTags) {
         if(tagNameList == null || tagNameList.isEmpty()) {
-            return List.of();
+            return projectTags;
         }
 
+        // TODO - 리스트 확인 후 추가 및 삭제 처리
+        projectTagRepository.deleteAll(projectTags);
+
         List<ProjectTag> ProjectTags = tagNameList
                 .stream()
                 .map(tagName -> ProjectTag.create(project, tagName))
diff --git a/Common/src/main/java/com/seveneleven/Main.java b/Common/src/main/java/com/seveneleven/Main.java
deleted file mode 100644
index c92cef05..00000000
--- a/Common/src/main/java/com/seveneleven/Main.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package com.seveneleven;
-
-import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
-
-@SpringBootApplication
-public class Main {
-    public static void main(String[] args) {
-        SpringApplication.run(Main.class, args);
-    }
-}
\ No newline at end of file
diff --git a/Common/src/main/java/com/seveneleven/entity/project/Project.java b/Common/src/main/java/com/seveneleven/entity/project/Project.java
index 16a0b00d..c1cfbbea 100644
--- a/Common/src/main/java/com/seveneleven/entity/project/Project.java
+++ b/Common/src/main/java/com/seveneleven/entity/project/Project.java
@@ -118,7 +118,6 @@ public Project update(
             String name,
             String description,
             ProjectStatusCode statusCode,
-            String contractNumber,
             LocalDate plannedStartDate,
             LocalDate plannedEndDate,
             LocalDate startDate,
@@ -132,7 +131,6 @@ public Project update(
         this.projectType = ProjectType;
         this.projectStatusCode = statusCode;
         this.bnsManager = bnsManager;
-        this.contractNumber = contractNumber;
         this.plannedStartDate = plannedStartDate;
         this.plannedEndDate = plannedEndDate;
         this.startDate = startDate;
diff --git a/Common/src/main/java/com/seveneleven/entity/project/ProjectAuthorization.java b/Common/src/main/java/com/seveneleven/entity/project/ProjectAuthorization.java
index 36394275..6fcb388b 100644
--- a/Common/src/main/java/com/seveneleven/entity/project/ProjectAuthorization.java
+++ b/Common/src/main/java/com/seveneleven/entity/project/ProjectAuthorization.java
@@ -4,6 +4,7 @@
 import com.seveneleven.entity.global.YesNo;
 import com.seveneleven.entity.global.converter.YesNoConverter;
 import com.seveneleven.entity.member.Member;
+import com.seveneleven.entity.project.constant.Authorization;
 import com.seveneleven.entity.project.constant.MemberType;
 import com.seveneleven.entity.project.duplkey.MemberProjectStepId;
 import jakarta.persistence.*;
@@ -34,12 +35,13 @@ public class ProjectAuthorization extends BaseEntity {
     private MemberType memberType; // 회원 구분 (client, developer)
 
     // Question - Enum으로 뺄까?
-    private String authorizationCode; // 권한 코드
+    @Enumerated(EnumType.STRING)
+    private Authorization authorizationCode; // 권한 코드
 
     @Convert(converter = YesNoConverter.class)
     private YesNo isActive; // 삭제 여부
 
-    private ProjectAuthorization(Member member, Project project, MemberType memberType, String authorizationCode) {
+    private ProjectAuthorization(Member member, Project project, MemberType memberType, Authorization authorizationCode) {
         this.id = new MemberProjectStepId(member.getId(), project.getId());
         this.member = member;
         this.project = project;
@@ -48,11 +50,11 @@ private ProjectAuthorization(Member member, Project project, MemberType memberTy
         this.isActive = YesNo.YES;
     }
 
-    public static ProjectAuthorization create(Member member, Project project, MemberType memberType, String authorizationCode) {
+    public static ProjectAuthorization create(Member member, Project project, MemberType memberType, Authorization authorizationCode) {
         return new ProjectAuthorization(member, project, memberType, authorizationCode);
     }
 
-    public void edit(MemberType memberType, String authorizationCode) {
+    public void edit(MemberType memberType, Authorization authorizationCode) {
         this.memberType = memberType;
         this.authorizationCode = authorizationCode;
     }
@@ -61,4 +63,8 @@ public ProjectAuthorizationHistory delete() {
         isActive = YesNo.NO;
         return ProjectAuthorizationHistory.create(this);
     }
+
+    public String getAuthorization() {
+        return authorizationCode.name();
+    }
 }
\ No newline at end of file
diff --git a/Common/src/main/java/com/seveneleven/entity/project/ProjectAuthorizationHistory.java b/Common/src/main/java/com/seveneleven/entity/project/ProjectAuthorizationHistory.java
index 1e103237..d0deb97a 100644
--- a/Common/src/main/java/com/seveneleven/entity/project/ProjectAuthorizationHistory.java
+++ b/Common/src/main/java/com/seveneleven/entity/project/ProjectAuthorizationHistory.java
@@ -38,7 +38,7 @@ private ProjectAuthorizationHistory(ProjectAuthorization authorization) {
         this.memberName = authorization.getMember().getName();
         this.projectName = authorization.getProject().getProjectName();
         this.memberType = authorization.getMemberType().name();
-        this.authorizationCode = authorization.getAuthorizationCode();
+        this.authorizationCode = authorization.getAuthorization();
         this.isActive = authorization.getIsActive();
     }
 
diff --git a/Main/src/main/java/com/seveneleven/project/dto/GetMemberAuthorization.java b/Main/src/main/java/com/seveneleven/project/dto/GetMemberAuthorization.java
index e9dd6671..6b43a692 100644
--- a/Main/src/main/java/com/seveneleven/project/dto/GetMemberAuthorization.java
+++ b/Main/src/main/java/com/seveneleven/project/dto/GetMemberAuthorization.java
@@ -24,7 +24,7 @@ public String toString() {
 
         private Response(ProjectAuthorization authorization) {
             this.memberId = authorization.getMember().getId();
-            this.authorization = authorization.getAuthorizationCode();
+            this.authorization = authorization.getAuthorization();
             this.memberType = authorization.getMemberType();
         }
 
diff --git a/Main/src/main/java/com/seveneleven/project/dto/GetProjectAuthorization.java b/Main/src/main/java/com/seveneleven/project/dto/GetProjectAuthorization.java
index aae212a4..8a058898 100644
--- a/Main/src/main/java/com/seveneleven/project/dto/GetProjectAuthorization.java
+++ b/Main/src/main/java/com/seveneleven/project/dto/GetProjectAuthorization.java
@@ -58,7 +58,7 @@ public String toString() {
         private CustomerMemberAuthorization(ProjectAuthorization projectAuthorization) {
             this.memberId = projectAuthorization.getMember().getId();
             this.memberName = projectAuthorization.getMember().getName();
-            this.projectAuthorization = projectAuthorization.getAuthorizationCode();
+            this.projectAuthorization = projectAuthorization.getAuthorization();
         }
 
         public static CustomerMemberAuthorization toDto(ProjectAuthorization projectAuthorization) {
@@ -82,7 +82,7 @@ public String toString() {
         private DeveloperMemberAuthorization(ProjectAuthorization projectAuthorization) {
             this.memberId = projectAuthorization.getMember().getId();
             this.memberName = projectAuthorization.getMember().getName();
-            this.projectAuthorization = projectAuthorization.getAuthorizationCode();
+            this.projectAuthorization = projectAuthorization.getAuthorization();
         }
 
         public static DeveloperMemberAuthorization toDto(ProjectAuthorization projectAuthorization) {
diff --git a/Main/src/main/java/com/seveneleven/project/dto/GetProjectDetail.java b/Main/src/main/java/com/seveneleven/project/dto/GetProjectDetail.java
index cd404f77..1dde4e61 100644
--- a/Main/src/main/java/com/seveneleven/project/dto/GetProjectDetail.java
+++ b/Main/src/main/java/com/seveneleven/project/dto/GetProjectDetail.java
@@ -110,7 +110,7 @@ private CustomerMemberAuthorization(ProjectAuthorization projectAuthorization) {
             this.memberName = projectAuthorization.getMember().getName();
             this.department = projectAuthorization.getMember().getDepartment();
             this.position = projectAuthorization.getMember().getPosition();
-            this.projectAuthorization = projectAuthorization.getAuthorizationCode();
+            this.projectAuthorization = projectAuthorization.getAuthorization();
         }
 
         public static CustomerMemberAuthorization toDto(ProjectAuthorization projectAuthorization) {
@@ -138,7 +138,7 @@ private DeveloperMemberAuthorization(ProjectAuthorization projectAuthorization)
             this.memberName = projectAuthorization.getMember().getName();
             this.department = projectAuthorization.getMember().getDepartment();
             this.position = projectAuthorization.getMember().getPosition();
-            this.projectAuthorization = projectAuthorization.getAuthorizationCode();
+            this.projectAuthorization = projectAuthorization.getAuthorization();
         }
 
         public static DeveloperMemberAuthorization toDto(ProjectAuthorization projectAuthorization) {
diff --git a/Main/src/main/java/com/seveneleven/project/dto/PostProjectAuthorization.java b/Main/src/main/java/com/seveneleven/project/dto/PostProjectAuthorization.java
index 9b10b280..4dc9b8b6 100644
--- a/Main/src/main/java/com/seveneleven/project/dto/PostProjectAuthorization.java
+++ b/Main/src/main/java/com/seveneleven/project/dto/PostProjectAuthorization.java
@@ -3,6 +3,7 @@
 import com.seveneleven.entity.member.Member;
 import com.seveneleven.entity.project.Project;
 import com.seveneleven.entity.project.ProjectAuthorization;
+import com.seveneleven.entity.project.constant.Authorization;
 import com.seveneleven.entity.project.constant.MemberType;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
@@ -30,7 +31,7 @@ public interface MemberAuthorization {
     public static abstract class BaseMemberAuthorization implements MemberAuthorization {
         protected Long memberId;
         protected MemberType memberType;
-        protected String projectAuthorization;
+        protected Authorization projectAuthorization;
 
         public abstract ProjectAuthorization toEntity(Project project, Member member);
 
@@ -92,7 +93,7 @@ public static Response create(Long projectId) {
     public static class FailList {
         private Long memberId;
         private MemberType memberType;
-        private String projectAuthorization;
+        private Authorization projectAuthorization;
         private HttpStatus status;
         private String message;