diff --git a/frontend/services/application/label.service.ts b/frontend/services/application/label.service.ts
index 012af0c2..a03e7930 100644
--- a/frontend/services/application/label.service.ts
+++ b/frontend/services/application/label.service.ts
@@ -1,12 +1,68 @@
-import { LabelItemList } from '@/models/label'
+import { LabelItem } from '@/models/label'
 import { LabelItemListRepository } from '@/repositories/label/interface'
 
+export class LabelDTO {
+  id: number
+  text: string
+  prefix_key: string | null
+  suffix_key: string | null
+  background_color: string
+  text_color: string
+
+  constructor(item: LabelItem) {
+    this.id = item.id
+    this.text = item.text
+    this.prefix_key = item.prefixKey
+    this.suffix_key = item.suffixKey
+    this.background_color = item.backgroundColor
+    this.text_color = '#ffffff'
+  }
+}
+
 export class LabelApplicationService {
   constructor(
     private readonly repository: LabelItemListRepository
   ) {}
 
-  public list(id: string): Promise<LabelItemList> {
-    return this.repository.list(id)
+  public async list(id: string): Promise<LabelDTO[]> {
+    const items = await this.repository.list(id)
+    return items.map(item => new LabelDTO(item))
+  }
+
+  public create(projectId: string, item: LabelDTO): void {
+    const label = new LabelItem(0, item.text, item.prefix_key, item.suffix_key, item.background_color, item.text_color)
+    this.repository.create(projectId, label)
+  }
+
+  public update(projectId: string, item: LabelDTO): void {
+    const label = new LabelItem(item.id, item.text, item.prefix_key, item.suffix_key, item.background_color, item.text_color)
+    this.repository.update(projectId, label)
+  }
+
+  public bulkDelete(projectId: string, items: LabelDTO[]): Promise<void> {
+    const ids = items.map(item => item.id)
+    return this.repository.bulkDelete(projectId, ids)
+  }
+
+  public async export(projectId: string) {
+    const items = await this.repository.list(projectId)
+    const labels = items.map(item => new LabelDTO(item))
+    const url = window.URL.createObjectURL(new Blob([JSON.stringify(labels, null, 2)]))
+    const link = document.createElement('a')
+    link.href = url
+    link.setAttribute('download', `label_config.json`)
+    document.body.appendChild(link)
+    link.click()
+  }
+
+  async upload(projectId: string, file: File) {
+    const formData = new FormData()
+    formData.append('file', file)
+    const config = {
+      headers: {
+        'Content-Type': 'multipart/form-data'
+      }
+    }
+    await this.repository.uploadFile(projectId, formData)
   }
 }