diff --git a/src/main/java/com/t3t/bookstoreapi/book/model/entity/Book.java b/src/main/java/com/t3t/bookstoreapi/book/model/entity/Book.java
index 9df385c8..779f9733 100644
--- a/src/main/java/com/t3t/bookstoreapi/book/model/entity/Book.java
+++ b/src/main/java/com/t3t/bookstoreapi/book/model/entity/Book.java
@@ -8,7 +8,6 @@
 import com.t3t.bookstoreapi.order.exception.BookStockShortageException;
 import com.t3t.bookstoreapi.publisher.model.entity.Publisher;
 import lombok.*;
-import org.springframework.data.jpa.repository.Lock;
 
 import javax.persistence.*;
 import java.math.BigDecimal;
diff --git a/src/main/java/com/t3t/bookstoreapi/tag/controller/TagController.java b/src/main/java/com/t3t/bookstoreapi/tag/controller/TagController.java
index 48ddd048..3ccb0dfd 100644
--- a/src/main/java/com/t3t/bookstoreapi/tag/controller/TagController.java
+++ b/src/main/java/com/t3t/bookstoreapi/tag/controller/TagController.java
@@ -10,9 +10,7 @@
 import org.springframework.data.domain.Sort;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 
 @RestController
@@ -49,4 +47,43 @@ public ResponseEntity<BaseResponse<PageResponse<TagDto>>> getTagList(
                 new BaseResponse<PageResponse<TagDto>>().data(tagList)
         );
     }
+
+    /**
+     * 태그 생성 요청
+     * @param tagName 태그 이름
+     * @return 200 OK, 메세지
+     * @author Yujin-nKim(김유진)
+     */
+    @PostMapping("/tags")
+    public ResponseEntity<BaseResponse<Void>> createTag(@RequestParam String tagName) {
+        tagService.createTag(tagName);
+        return ResponseEntity.status(HttpStatus.OK).body(
+                new BaseResponse<Void>().message("태그 생성 요청이 처리되었습니다."));
+    }
+
+    /**
+     * 태그 수정 요청
+     * @param tagId 수정할 태그의 식별자
+     * @param tagName 태그 이름
+     * @return 200 OK, 메세지
+     * @author Yujin-nKim(김유진)
+     */
+    @PutMapping("/tags/{tagId}")
+    public ResponseEntity<BaseResponse<Void>> modifyTag(@PathVariable Long tagId, @RequestParam String tagName) {
+        tagService.modifyTag(tagId, tagName);
+        return ResponseEntity.status(HttpStatus.OK).body(
+                new BaseResponse<Void>().message("태그 수정 요청이 처리되었습니다."));
+    }
+
+    /**
+     * 태그 상세  조회
+     * @param tagId 수정할 태그의 식별자
+     * @return 태그 상세
+     * @author Yujin-nKim(김유진)
+     */
+    @GetMapping("/tags/{tagId}")
+    public ResponseEntity<BaseResponse<TagDto>> getTag(@PathVariable Long tagId) {
+        return ResponseEntity.status(HttpStatus.OK).body(
+                new BaseResponse<TagDto>().data(tagService.getTag(tagId)));
+    }
 }
diff --git a/src/main/java/com/t3t/bookstoreapi/tag/exception/TagNameAlreadyExistsException.java b/src/main/java/com/t3t/bookstoreapi/tag/exception/TagNameAlreadyExistsException.java
new file mode 100644
index 00000000..877ccac7
--- /dev/null
+++ b/src/main/java/com/t3t/bookstoreapi/tag/exception/TagNameAlreadyExistsException.java
@@ -0,0 +1,10 @@
+package com.t3t.bookstoreapi.tag.exception;
+
+public class TagNameAlreadyExistsException extends RuntimeException{
+
+    private static final String DEFAULT_MESSAGE = "이미 등록된 태그 이름입니다.";
+
+    public TagNameAlreadyExistsException() {
+        super(DEFAULT_MESSAGE);
+    }
+}
diff --git a/src/main/java/com/t3t/bookstoreapi/tag/model/entity/Tag.java b/src/main/java/com/t3t/bookstoreapi/tag/model/entity/Tag.java
index 7f850b14..047818ad 100644
--- a/src/main/java/com/t3t/bookstoreapi/tag/model/entity/Tag.java
+++ b/src/main/java/com/t3t/bookstoreapi/tag/model/entity/Tag.java
@@ -1,10 +1,16 @@
 package com.t3t.bookstoreapi.tag.model.entity;
 
 import javax.validation.constraints.NotNull;
+
+import com.t3t.bookstoreapi.tag.model.dto.TagDto;
 import lombok.*;
 
 import javax.persistence.*;
 
+/**
+ * 태그(tags) 엔티티
+ * @author Yujin-nKim(김유진)
+ */
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 @AllArgsConstructor
 @Builder
@@ -21,4 +27,26 @@ public class Tag {
     @NotNull
     @Column(name = "tag_name")
     private String tagName;
+
+    /**
+     * 태그의 이름을 업데이트
+     * @param tagName 업데이트 이름
+     * @author Yujin-nKim(김유진)
+     */
+    public void updateTagName(String tagName) {
+        this.tagName = tagName;
+    }
+
+    /**
+     * Tag 객체를 TagDto 객체로 변환
+     * @param tag tag 객체
+     * @return TagDto 객체
+     * @author Yujin-nKim(김유진)
+     */
+    public TagDto of(Tag tag) {
+        return TagDto.builder()
+                .id(tag.getTagId())
+                .name(tag.getTagName())
+                .build();
+    }
 }
diff --git a/src/main/java/com/t3t/bookstoreapi/tag/repository/TagRepository.java b/src/main/java/com/t3t/bookstoreapi/tag/repository/TagRepository.java
index 4f6677e1..257b96ed 100644
--- a/src/main/java/com/t3t/bookstoreapi/tag/repository/TagRepository.java
+++ b/src/main/java/com/t3t/bookstoreapi/tag/repository/TagRepository.java
@@ -15,4 +15,11 @@ public interface TagRepository extends JpaRepository<Tag, Long> {
      * @author Yujin-nKim(김유진)
      */
     Page<Tag> findAll(Pageable pageable);
+
+    /**
+     * 주어진 태그 이름이 존재하는지 여부를 확인
+     * @param tagName 확인할 태그 이름
+     * @return 태그 이름이 존재하면 true, 그렇지 않으면 false를 반환
+     */
+    boolean existsByTagName(String tagName);
 }
diff --git a/src/main/java/com/t3t/bookstoreapi/tag/service/TagService.java b/src/main/java/com/t3t/bookstoreapi/tag/service/TagService.java
index 55954469..d5cc3654 100644
--- a/src/main/java/com/t3t/bookstoreapi/tag/service/TagService.java
+++ b/src/main/java/com/t3t/bookstoreapi/tag/service/TagService.java
@@ -1,6 +1,8 @@
 package com.t3t.bookstoreapi.tag.service;
 
 import com.t3t.bookstoreapi.model.response.PageResponse;
+import com.t3t.bookstoreapi.tag.exception.TagNameAlreadyExistsException;
+import com.t3t.bookstoreapi.tag.exception.TagNotFoundException;
 import com.t3t.bookstoreapi.tag.model.dto.TagDto;
 import com.t3t.bookstoreapi.tag.model.entity.Tag;
 import com.t3t.bookstoreapi.tag.repository.TagRepository;
@@ -44,4 +46,37 @@ public PageResponse<TagDto> getTagList(Pageable pageable) {
                 .last(tagPage.isLast())
                 .build();
     }
+
+    /**
+     * 태그 생성
+     * @param tagName 태그 이름
+     * @author Yujin-nKim(김유진)
+     */
+    public void createTag(String tagName) {
+        if (tagRepository.existsByTagName(tagName)) {
+            throw new TagNameAlreadyExistsException();
+        }
+        tagRepository.save(Tag.builder().tagName(tagName).build());
+    }
+
+    /**
+     * 태그 수정
+     * @param tagId 수정할 태그의 식별자
+     * @param tagName 태그 이름
+     * @author Yujin-nKim(김유진)
+     */
+    public void modifyTag(Long tagId, String tagName) {
+        Tag tag = tagRepository.findById(tagId).orElseThrow(TagNotFoundException::new);
+        tag.updateTagName(tagName);
+    }
+
+    /**
+     * 태그 상세  조회
+     * @param tagId 수정할 태그의 식별자
+     * @return 태그 상세
+     * @author Yujin-nKim(김유진)
+     */
+    public TagDto getTag(Long tagId) {
+        return TagDto.of(tagRepository.findById(tagId).orElseThrow(TagNotFoundException::new));
+    }
 }
\ No newline at end of file