diff --git a/src/app/api/qna/service.ts b/src/app/api/qna/service.ts
index 5558a1e..a9d03d1 100644
--- a/src/app/api/qna/service.ts
+++ b/src/app/api/qna/service.ts
@@ -1,5 +1,4 @@
 import { SessionData } from '@/types/Auth'
-import { CommonCode, InquiryRequest } from '@/types/Inquiry'
 import { ERROR_MESSAGE } from '@/hooks/useAlertMsg'
 import { HttpStatusCode } from 'axios'
 import { ApiError } from 'next/dist/server/api-utils'
@@ -55,36 +54,6 @@ export class QnaService {
     return new ApiError(response.result.code, response.result.message)
   }
 
-  /**
-   * @description 문의 유형 타입 목록 조회
-   * @param {string[]} responseList 문의 유형 타입 목록
-   * @returns {CommonCode[]} 문의 유형 타입 목록
-   */
-  getInquiryTypeList(responseList: any): CommonCode[] {
-    const codeList: CommonCode[] = []
-    const headCdList: { headCd: string; headId: string }[] = []
-    responseList.apiHeadCdList.forEach((item: any) => {
-      if (item.headId === 'QNA_CLS_LRG_CD' || item.headId === 'QNA_CLS_MID_CD' || item.headId === 'QNA_CLS_SML_CD') {
-        headCdList.push({
-          headCd: item.headCd,
-          headId: item.headId,
-        })
-      }
-    })
-    responseList.apiCommCdList.forEach((item: any) => {
-      if (headCdList.some((headCd) => headCd.headCd === item.headCd)) {
-        codeList.push({
-          headCd: item.headCd,
-          headId: headCdList.find((headCd) => headCd.headCd === item.headCd)?.headId ?? '',
-          code: item.code,
-          name: item.codeJp,
-          refChar1: item.refChr1,
-        })
-      }
-    })
-    return codeList
-  }
-
   /**
    * @description 문의 목록 조회 파라미터 처리
    * @param {URLSearchParams} searchParams URLSearchParams 객체
diff --git a/src/components/inquiry/Detail.tsx b/src/components/inquiry/Detail.tsx
index f451d80..8a22621 100644
--- a/src/components/inquiry/Detail.tsx
+++ b/src/components/inquiry/Detail.tsx
@@ -61,9 +61,9 @@ export default function Detail() {
           </div>
           <div className="inquiry-detail-data">
             <div className="inquiry-detail-category">
-              <span>{commonCodeList.find((code) => code.code === inquiryDetail?.qnaClsLrgCd)?.name}</span>
-              <span>{commonCodeList.find((code) => code.code === inquiryDetail?.qnaClsMidCd)?.name}</span>
-              <span>{commonCodeList.find((code) => code.code === inquiryDetail?.qnaClsSmlCd)?.name}</span>
+              <span>{commonCodeList.find((code) => code.code === inquiryDetail?.qnaClsLrgCd)?.codeJp}</span>
+              <span>{commonCodeList.find((code) => code.code === inquiryDetail?.qnaClsMidCd)?.codeJp}</span>
+              <span>{commonCodeList.find((code) => code.code === inquiryDetail?.qnaClsSmlCd)?.codeJp}</span>
             </div>
             <div className="inquiry-detail-tit">{inquiryDetail?.qstTitle}</div>
             <div className="inquiry-detail-txt">{inquiryDetail?.qstContents}</div>