diff --git a/apps/as/src/entities/instl-sncn/model/instl-sncn-interface.ts b/apps/as/src/entities/instl-sncn/model/instl-sncn-interface.ts
index 7593d5f8e..6a3d07ff9 100644
--- a/apps/as/src/entities/instl-sncn/model/instl-sncn-interface.ts
+++ b/apps/as/src/entities/instl-sncn/model/instl-sncn-interface.ts
@@ -29,6 +29,7 @@ export interface InstlSncnMng {
   chrgrNm?: string;
   instNm?: string;
   envoSeComCd: string;
+  sncnSeComCd: string;
   envoSeCdNm: string;
   taskSeComCd: string;
   taskSeCdNm: string;
diff --git a/apps/as/src/pages/instl-sncn/ui/cnfm-regist-page.tsx b/apps/as/src/pages/instl-sncn/ui/cnfm-regist-page.tsx
index c5140496b..e144f7d17 100644
--- a/apps/as/src/pages/instl-sncn/ui/cnfm-regist-page.tsx
+++ b/apps/as/src/pages/instl-sncn/ui/cnfm-regist-page.tsx
@@ -9,8 +9,8 @@ import axios from "axios";
 import { type HttpResponse, Upload } from "tus-js-client";
 
 import { AUTH_USER_ID, CLAIM_NAME, ENDPOINT, PROXY_HOST } from "@/shared/config";
-import { deleteAttachment  } from "@/shared/lib/attach";
 import { getCookie, setCookie, useAlertStore, useUserStore } from "@/shared/lib";
+import { deleteAttachment  } from "@/shared/lib/attach";
 import { formatFileSize } from "@/shared/lib/file-utils";
 import type { AcntgSeMngTreeDto } from "@/entities/acntg";
 import { acntgService } from "@/entities/acntg";
@@ -30,7 +30,7 @@ import {
   type InstlSncnBzScaleSaveDto,
   type InstlSncnMng,
 } from "@/entities/instl-sncn";
-
+import { EtcAttachments,NumCell, PrivacyConsent, ReadCell } from "@/widgets/cnfm";
 import { Button, Input } from "@common/components";
 
 import "./cnfm-page.css";
@@ -68,12 +68,8 @@ const emptyAmt = (): BzAmtRow => ({ bscPl: "", budgetReflct: "", thtiDsgn: "" })
 
 const num = (v: string) => parseFloat(v.replace(/,/g, "") || "0");
 const fmt = (v: number) => (isNaN(v) ? "" : v.toLocaleString());
-const DEFAULT_RVW_STP_COM_CD = "LOCAL"; // LOCAL.지자체,ENV.환경청,KECO.환경공단 (검토단계공통코드:RVWSTP 참조)
-
-/* ------------------------------------------------------------------ */
-/* 공통 셀 컴포넌트 분리: widgets/cnfm/ui/cells.tsx에서 import */
-/* ------------------------------------------------------------------ */
-import { NumCell, ReadCell, PrivacyConsent, EtcAttachments } from '@/widgets/cnfm';
+const DEFAULT_RVW_STP_COM_CD = "LOCAL"; //검토단계공통코드: RVWSTP ( 상세 코드 : LOCAL.지자체,ENV.환경청,KECO.환경공단)
+const DEFAULT_SNCN_SE_COM_CD = "CNFM";
 
 /* ------------------------------------------------------------------ */
 /* 메인 컴포넌트                                                          */
@@ -88,7 +84,7 @@ import { NumCell, ReadCell, PrivacyConsent, EtcAttachments } from '@/widgets/cnf
  *
  * - 주요 detFields (det 또는 detDto 내부):
  *   - bizNm, bizBgngYr, bizEndYr, bizCn
- *   - envoSeComCd or envoSeCd (설치구분)
+ *   - sncnSeComCd or envoSeComCd or envoSeCd (설치구분)
  *   - dsgnrNm, dsgnrOgdpNm (소속), dsgnrTelno, dsgnrEmlAddr
  *   - privacyAgree ("Y" | "N")
  *   - aplcntNm, aplcntMblTelno, aplcntOgdpNm, aplcntEmlAddr
@@ -109,11 +105,11 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
   const userInfo = useUserStore((state) => state.userInfo);
   const alert = useAlertStore((state) => state.setMessage);
   const qc = useQueryClient();
+  const currentDet = useMemo(() => initialData?.detDto ?? initialData, [initialData]);
 
   const docId = useMemo(() => {
-    const det = initialData?.detDto ?? initialData;
-    return det?.instlSncnDocNo ?? det?.instlSncnDocNo ?? "";
-  }, [initialData]);
+    return currentDet?.instlSncnDocNo ?? "";
+  }, [currentDet]);
 
   const [docSeComCd] = useState("INSTL");
   const [taskSeComCdNm, setTaskSeComCdNm] = useState("재이용수");
@@ -138,7 +134,7 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
   const [bzBgngYr, setBzBgngYr] = useState("");
   const [bzEndYr, setBzEndYr] = useState("");
   const [bzCn, setBzCn] = useState("");
-  const [instlCnfmApr, setInstlCnfmApr] = useState("CNFM");
+  const [sncnSeComCd, setSncnSeComCd] = useState("CNFM");
 
   /* ── 설계자 정보 ── */
   const [dsgnrNm, setDsgnrNm] = useState("");
@@ -269,7 +265,7 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
     if (initialMappedRef.current) return;
 
     try {
-      const det = (initialData.detDto ?? initialData) as any;
+      const det = (currentDet ?? {}) as any;
 
       const bizSclList = initialData.bizSclList ?? [];
       const bizCstList = initialData.bizCstList ?? [];
@@ -283,7 +279,7 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
       setBzBgngYr(det.bizBgngYr ?? "");
       setBzEndYr(det.bizEndYr ?? "");
       setBzCn(det.bizCn ?? "");
-      setInstlCnfmApr(det.envoSeComCd ?? det.envoSeCd ?? "CNFM");
+      setSncnSeComCd(det.sncnSeComCd ?? det.envoSeComCd ?? det.envoSeCd ?? DEFAULT_SNCN_SE_COM_CD);
 
       // 설계자
       setDsgnrNm(det.dsgnrNm ?? "");
@@ -862,7 +858,8 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
     sggNm: "",
     chrgrNm: "",
     instNm: "",
-    envoSeComCd: instlCnfmApr,
+    envoSeComCd: currentDet?.envoSeComCd ?? "",
+    sncnSeComCd: sncnSeComCd || DEFAULT_SNCN_SE_COM_CD,
     envoSeCdNm: "",
     taskSeComCd,
     taskSeCdNm: taskSeComCdNm,
@@ -1037,10 +1034,10 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
                     <label key={val} className="flex cursor-pointer items-center gap-1">
                       <input
                         type="radio"
-                        name="instlCnfmApr"
+                        name="sncnSeComCd"
                         value={val}
-                        checked={instlCnfmApr === val}
-                        onChange={() => setInstlCnfmApr(val)}
+                        checked={sncnSeComCd === val}
+                        onChange={() => setSncnSeComCd(val)}
                       />
                       {label}
                     </label>
diff --git a/apps/as/src/pages/instl-sncn/ui/cnfm-view-page.tsx b/apps/as/src/pages/instl-sncn/ui/cnfm-view-page.tsx
index 0e56805f3..20b289293 100644
--- a/apps/as/src/pages/instl-sncn/ui/cnfm-view-page.tsx
+++ b/apps/as/src/pages/instl-sncn/ui/cnfm-view-page.tsx
@@ -75,7 +75,11 @@ function CnfmViewPage({ id }: { id: string }) {
               <th>업무구분</th>
               <td>{det.taskSeCdNm || det.taskSeComCd || "-"}</td>
               <th>행정동ID</th>
-              <td>{det.dongId || "-"}</td>
+              <td>{det.admdstCd || "-"}</td>
+            </tr>
+            <tr>
+              <th>사업구분(인가구분)</th>
+              <td colSpan={3}>{det.sncnSeComCd || "-"}</td>
             </tr>
             <tr>
               <th>진행상태</th>