diff --git a/apps/wr/app/store/matDmd/coMatRvw/index.tsx b/apps/wr/app/store/matDmd/coMatRvw/index.tsx
index db4b47370..b347a1df8 100644
--- a/apps/wr/app/store/matDmd/coMatRvw/index.tsx
+++ b/apps/wr/app/store/matDmd/coMatRvw/index.tsx
@@ -66,7 +66,7 @@ type coRvwActions = {
     sggCd: string
   ) => void;
 };
-
+// 수요매칭검토현황 목록
 const coMatInit = async (
   pageNo: number,
   pageCnt: number,
@@ -149,6 +149,7 @@ export const coRvwActionsExport: (set: any) => coRvwActions = (set: any) => {
       sggCd: string,
       dmdCoNm: string
     ) => {
+      // 수요처 년도별 정보 검색
       let url = `/reuseFc/request/infoList/Sub/${pageNo}/${pageCnt}/${startYear}/${endYear}`;
 
       if (sggCd.length > 0) {
diff --git a/apps/wr/app/store/matDmd/coMatRvw/type.tsx b/apps/wr/app/store/matDmd/coMatRvw/type.tsx
index 771fc03c4..d195953cd 100644
--- a/apps/wr/app/store/matDmd/coMatRvw/type.tsx
+++ b/apps/wr/app/store/matDmd/coMatRvw/type.tsx
@@ -93,7 +93,7 @@ export const DmdCoReqSchema = z.object({
   demandCo: DemandCoSchema.nullish(), // 수요처 정보
   demandMatching: DemandMatchingSchema.nullish(), // 매칭 정보
   demandCst: DemandCstSchema.nullish(), // 공사비 정보
-  ruseUtztnFcltNm: z.string().nullish(), // 공급처 선정
+  ruseUtztnFcltNm: z.string().nullish(), // 공급처명
   splyCndtList: z.array(
     z.object({
       ruseUtztnFcltNm: z.string(), // 공급처명
diff --git a/apps/wr/components/ui/form/coMat/conCostForm/conCostForm.tsx b/apps/wr/components/ui/form/coMat/conCostForm/conCostForm.tsx
index 8dd87dfb4..3e118154b 100644
--- a/apps/wr/components/ui/form/coMat/conCostForm/conCostForm.tsx
+++ b/apps/wr/components/ui/form/coMat/conCostForm/conCostForm.tsx
@@ -122,16 +122,34 @@ export default function ConCostForm({
       link.click();
     });
   };
-  const usgPrcsProcsWatch = activeForm.watch("demandCst.usgPrcsProcs");
-  const dmndQtyWatch = activeForm.watch("dmndQty");
-  const totalConstCost = activeForm.watch("totalConstCost");
-  const cstrnCst = activeForm.watch("demandCst.cstrnCst") || 0;
-  const splyList = activeForm.watch("splyCndtList");
-  const useUsgCdWatch = activeForm.watch("useUsgCd");
+  const usgPrcsProcsWatch = activeForm.watch("demandCst.usgPrcsProcs"); // 용도에 따른 처리공정
+  const dmndQtyWatch = activeForm.watch("dmndQty"); // 요구수량(m³/일)
+  const totalConstCost = activeForm.watch("totalConstCost"); // 처리시설 총사업비(백만원)
+  const cstrnCst = activeForm.watch("demandCst.cstrnCst") || 0; // 공급관로 표준공사비(백만원)
+  const prcsFcltCpctCstrnCst = activeForm.watch("demandCst.prcsFcltCpctCstrnCst") || 0; // 처리시설용량에 따른 공사비(백만원)
+  const fcltSbsdCstrnCst = activeForm.watch("demandCst.fcltSbsdCstrnCst") || 0; // 시설부대경비
+  const splyList = activeForm.watch("splyCndtList"); // 공급처 후보지 목록
+  const useUsgCdWatch = activeForm.watch("useUsgCd"); // 사용 용도 코드
+  const ruseUtztnFcltNmWatch = activeForm.watch("ruseUtztnFcltNm"); // 선정된 공급처 명
   const useUsgCdLabel =
-    code.sewageOutFclttUse?.find((item) => item.val === useUsgCdWatch)?.text ??
+    code.sewageOutFclttUse?.find((item) => item.val === useUsgCdWatch)?.text ?? // 사용 용도 명칭(라벨)
     String(useUsgCdWatch ?? "");
 
+  useEffect(() => {
+    const calculatedTotalConstCost =
+      Number(prcsFcltCpctCstrnCst) + Number(fcltSbsdCstrnCst);
+
+    if ((totalConstCost ?? 0) !== calculatedTotalConstCost) {
+      activeForm.setValue("totalConstCost", calculatedTotalConstCost);
+    }
+  }, [
+    activeForm,
+    prcsFcltCpctCstrnCst,
+    fcltSbsdCstrnCst,
+    totalConstCost,
+    selectionVersion,
+  ]);
+
   // 용도 변경 시 처리공정 자동 매핑 (시뮬레이션 대응)
   useEffect(() => {
     if (useUsgCdWatch) {
@@ -239,13 +257,13 @@ export default function ConCostForm({
       return;
     }
 
-    // const pk =
-    //   splycd && splycd[0]?.ruseUtztnFcltCd
-    //     ? splycd[0]?.ruseUtztnFcltCd
-    //     : "11000SW001R1";
+    // 1순위: 팝업에서 새로 선택한 코드 (lastSub)
+    // 2순위: 기존 DB에서 불러와 폼에 저장된 코드 (demandMatching.pbnstRuseFcltId)
+    const pk =
+      lastSub?.ruseUtztnFcltCd ??
+      activeForm.getValues("demandMatching.pbnstRuseFcltId") ??
+      null;
 
-    const pk =lastSub?.ruseUtztnFcltCd??null; // 후보지
-  
     if (type === "mat") {
       if (value.demandCst) {
         const data: DedMatUpdateType = {
@@ -652,13 +670,14 @@ export default function ConCostForm({
               </div>
               <FormUi label="">
                   <Input
-                    placeholder=""
+                    placeholder="공급처를 선정해주세요"
                     type="text"
-                    value={lastSub?.ruseUtztnFcltNm || ""}
+                    // 1순위: 팝업에서 새로 선택한 값(lastSub)
+                    // 2순위: 기존 DB에서 불러온 값(ruseUtztnFcltNmWatch)
+                    value={lastSub?.ruseUtztnFcltNm || ruseUtztnFcltNmWatch || ""}
                     readOnly
                     className={`mt-2 ${readOnlyInputClass}`}
                   />
-                
               </FormUi>
             </div>
           )}