diff --git a/apps/wr/app/(popUp-layout)/constCostSimulation/page.tsx b/apps/wr/app/(popUp-layout)/constCostSimulation/page.tsx
new file mode 100644
index 000000000..870f54b1f
--- /dev/null
+++ b/apps/wr/app/(popUp-layout)/constCostSimulation/page.tsx
@@ -0,0 +1,20 @@
+"use client";
+
+/**
+ * 표준공사비 시뮬레이션 Popup
+ */
+import { useForm } from "react-hook-form";
+import ConCostForm from "@/components/ui/form/coMat/conCostForm/conCostForm";
+import type { DmdCoReqType } from "@/app/store/matDmd/coMatRvw/type";
+
+export default function ConstCostSimulationPage() {
+  const form = useForm<DmdCoReqType>({
+    defaultValues: {
+      dmndQty: 0,
+      demandCst: { cstrnCst: 0, usgPrcsProcs: "", prcsFcltCpctCstrnCst: 0, fcltSbsdCstrnCst: 0 },
+      totalConstCost: 0
+    } as any
+  });
+
+  return <ConCostForm form={form} type="simulation" readonly={false} />;
+}
diff --git a/apps/wr/app/(with-layout)/matMng/coMat/coMatRvw/page.tsx b/apps/wr/app/(with-layout)/matMng/coMat/coMatRvw/page.tsx
index 4304945bd..e2e80f745 100644
--- a/apps/wr/app/(with-layout)/matMng/coMat/coMatRvw/page.tsx
+++ b/apps/wr/app/(with-layout)/matMng/coMat/coMatRvw/page.tsx
@@ -74,9 +74,7 @@ export default function CoMatRvw() {
   const [toDate, setToDate] = useState<string>(
     String(new Date().getFullYear())
   );
-  const [selectData, setSelectData] = useState<DmdCoReqType>(
-    {} as DmdCoReqType
-  );
+  const [selectData, setSelectData] = useState<DmdCoReqType | null>(null); // selectData를 null로 초기화
   const [selectionVersion, setSelectionVersion] = useState(0);
   const bottomRef = useRef<HTMLDivElement | null>(null);
 
@@ -122,7 +120,7 @@ export default function CoMatRvw() {
     if (coMatRvwRes && coMatRvwRes[index]) {
       setSelectData(coMatRvwRes[index]);
       setSelectionVersion((v) => v + 1); // 행을 클릭할 때마다 버전을 1씩 증가
-      bottomRef.current?.scrollIntoView({ behavior: "smooth" }); // 화면 스크로 처리
+      bottomRef.current?.scrollIntoView({ behavior: "smooth" }); // 화면 스크롤 처리
     }
   };
   const useUsgCdWatch = useWatch({ control: form.control, name: "useUsgCd" });
@@ -131,7 +129,6 @@ export default function CoMatRvw() {
     String(useUsgCdWatch ?? "");
   useEffect(() => {
     if (useUsgCdWatch) {
-      console.log("useUsgCdWatch:" , useUsgCdWatch);
       const normalizedUseUsgCd =
         code.sewageOutFclttUse?.find((item) => item.val === useUsgCdWatch)?.val ??
         code.sewageOutFclttUse?.find((item) => item.text === useUsgCdWatch)?.val ??
@@ -205,6 +202,20 @@ export default function CoMatRvw() {
       setSelectionVersion((v) => v + 1); // 강제로 바뀌었다고 알리기
     }
   }, [selectData, form]);
+
+  /**
+   * 하수 표준공사비 시뮬레이션(모의산정)
+   */
+  const constCostSimulation = () => {
+    const url = `/constCostSimulation`;
+    const width = window.screen.availWidth;
+    const height = 600;
+    const left = 0;
+    const top = 0;
+    const popupOptions = `width=${width},height=${height},left=${left},top=${top},resizable=yes,scrollbars=yes`;
+    window.open(url, "candidatePopup", popupOptions);
+  };
+
   return (
     <>
       <ContentsDiv>
@@ -290,6 +301,9 @@ export default function CoMatRvw() {
                     >
                       조회
                     </Button>
+                    <Button className={btnClass} onClick={()=>constCostSimulation()} >
+                      표준공사비 모의산정
+                    </Button>
                   </div>
                 </div>
               </SearchFormRight>
@@ -773,5 +787,3 @@ export default function CoMatRvw() {
     </>
   );
 }
-
-
diff --git a/apps/wr/components/ui/form/coMat/conCostForm/conCostForm.tsx b/apps/wr/components/ui/form/coMat/conCostForm/conCostForm.tsx
index 932382709..40dd1c215 100644
--- a/apps/wr/components/ui/form/coMat/conCostForm/conCostForm.tsx
+++ b/apps/wr/components/ui/form/coMat/conCostForm/conCostForm.tsx
@@ -20,20 +20,21 @@ import {
   Form,
   FormField,
   FormUi,
+  SelectBox,
   UiTable,
 } from "@common/business_components/ui";
 import { useConfirm } from "@frontend-opensource/use-react-hooks";
 import PopoverUi from "@common/business_components/ui/popover_ui";
 import { Button, Checkbox, Input, Label } from "@common/components/ui";
 import { useCallback, useEffect, useRef, useState } from "react";
-import { type UseFormReturn } from "react-hook-form";
+import { useForm, type UseFormReturn } from "react-hook-form";
 /**
- *   ConCostForm 
- * 호출: (with-layout)/matMng/coMat/coMatRvw 에서 호출
+ * ConCostForm
+ * 호출: (with-layout)/matMng/coMat/coMatRvw
  *
- *  공사비를 산정하고  
- *  
- * */
+ * @param form - 외부에서 전달된 폼 객체 (없을 경우 시뮬레이션용 로컬 폼 사용)
+ * @param type - "mat": 매칭, "hist": 이력, "simulation": 모의산정
+ */
 
 export default function ConCostForm({
   form,
@@ -41,11 +42,22 @@ export default function ConCostForm({
   selectionVersion,
   readonly = false,
 }: {
-  form: UseFormReturn<DmdCoReqType>;
+  form?: UseFormReturn<DmdCoReqType>;
   type: string;
-  selectionVersion: number;
-  readonly: boolean;
+  selectionVersion?: number;
+  readonly?: boolean;
 }) {
+  // 시뮬레이션 모드를 위한 로컬 폼 생성
+  const localForm = useForm<DmdCoReqType>({
+    defaultValues: {
+      dmndQty: 0,
+      demandCst: { cstrnCst: 0, usgPrcsProcs: "" }
+    } as any
+  });
+
+  const activeForm = form || localForm;
+  const isSim = type === "simulation";
+
   const readOnlyInputClass = "bg-slate-50 text-gray-700";
   const {
     constCostRes, // 표준사업비
@@ -105,23 +117,33 @@ export default function ConCostForm({
       link.click();
     });
   };
-  const usgPrcsProcsWatch = form.watch("demandCst.usgPrcsProcs");
-  const dmndQtyWatch = form.watch("dmndQty");
-  const totalConstCost = form.watch("totalConstCost");
-  const cstrnCst = form.watch("demandCst.cstrnCst");
-  const splyList = form.watch("splyCndtList");
-  const useUsgCdWatch = form.watch("useUsgCd");
+  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 useUsgCdLabel =
     code.sewageOutFclttUse?.find((item) => item.val === useUsgCdWatch)?.text ??
     String(useUsgCdWatch ?? "");
 
+  // 용도 변경 시 처리공정 자동 매핑 (시뮬레이션 대응)
+  useEffect(() => {
+    if (useUsgCdWatch) {
+      const matched = usageProcData.find((item) => item.useUsgCd === useUsgCdWatch);
+      if (matched && matched.process !== usgPrcsProcsWatch) {
+        activeForm.setValue("demandCst.usgPrcsProcs", matched.process);
+      }
+    }
+  }, [useUsgCdWatch, activeForm, usgPrcsProcsWatch]);
+
   /**
    * 표준공산비 산정 : "계산"버튼 click시
    */
   const calculateConstCost = useCallback(() => {
     const usgPrcsProcs = usgPrcsProcsWatch;
-    if (selectionVersion == 0) {
-      alert("먼저 목록에서 수요신청 건을 선택하세요.");
+    if (!isSim && selectionVersion == 0) {
+      alert("목록에서 수요신청 건을 선택하세요.");
       return;
     }
     if (!dmndQtyWatch) {
@@ -194,12 +216,12 @@ export default function ConCostForm({
         100;
       const realResult = result + fcltSbsdCstrnCst;
 
-      form.setValue("demandCst.prcsFcltCpctCstrnCst", Math.round(result));
-      form.setValue("demandCst.fcltSbsdCstrnCst", Math.round(fcltSbsdCstrnCst));
-      form.setValue("totalConstCost", Math.round(realResult));
+      activeForm.setValue("demandCst.prcsFcltCpctCstrnCst", Math.round(result));
+      activeForm.setValue("demandCst.fcltSbsdCstrnCst", Math.round(fcltSbsdCstrnCst));
+      activeForm.setValue("totalConstCost", Math.round(realResult));
       alert("표준공산비 산정이 완료되었습니다.");
     }
-  }, [constCostRes, rateFeeRes, usgPrcsProcsWatch, dmndQtyWatch]);
+  }, [constCostRes, rateFeeRes, usgPrcsProcsWatch, dmndQtyWatch, isSim, selectionVersion, activeForm]);
 
   /**
    * 저장 버튼 click 시 실행
@@ -235,11 +257,11 @@ export default function ConCostForm({
 
           if (checkFinish) {
             if (await confirm("검토완료 변경시 공사비는 변경할수 없습니다.\n진행하시겠습니까?")) {
-              const message = await coMatRvwUpdate( pk, form.getValues("dmdInfoId"), data );
+              const message = await coMatRvwUpdate( pk, activeForm.getValues("dmdInfoId"), data );
               alert(message);
             }
           } else {
-            const message = await coMatRvwUpdate( pk, form.getValues("dmdInfoId"), data );
+            const message = await coMatRvwUpdate( pk, activeForm.getValues("dmdInfoId"), data );
             alert(message);
           }
         }else{
@@ -292,10 +314,11 @@ export default function ConCostForm({
 
 
   useEffect(() => {
-    form.register("dmdInfoSn");
-    form.register("dmdInfoId");
-    form.register("ruseUtztnFcltNm");
-  }, []);
+    if (!activeForm) return;
+    activeForm.register("dmdInfoSn");
+    activeForm.register("dmdInfoId");
+    activeForm.register("ruseUtztnFcltNm");
+  }, [activeForm]);
 
   
   /**
@@ -309,7 +332,7 @@ export default function ConCostForm({
       alert("먼저 목록에서 수요신청 건을 선택하세요.");
       return;
     }
-    const dmdInfoId = form.getValues("dmdInfoId");
+    const dmdInfoId = activeForm.getValues("dmdInfoId");
     console.log(dmdInfoId)
 
     const url = `/splyPopup?dmdInfoId=${encodeURIComponent(dmdInfoId)}`;
@@ -324,7 +347,7 @@ export default function ConCostForm({
   return (
     <>
       
-      <Form {...form}>
+      <Form {...activeForm}>
         {/* <h3 className="mt-4 ml-2 text-2xl font-medium text-label">
           표준공사비 산정
         </h3> */}
@@ -334,36 +357,35 @@ export default function ConCostForm({
           <Button className="mx-3" size={"sm"} onClick={calculateConstCost}>
             계산
           </Button>
-          <Button
-            className="mr-3"
-            size={"sm"}
-            onClick={form.handleSubmit(onSubmit)}
-            disabled={readonly}
-          >
-            저장
-          </Button>
-          <Label>검토완료</Label>
-          <Checkbox
-            className="ml-3 mr-6"
-            checked={checkFinish}
-            onCheckedChange={
-              (checked) => {
-                if (readonly) return;
-                setCheckFinish(checked === true);
-              }
-
-              // 'indeterminate' 상태를 무시하고 순수 boolean 값으로만 상태를 업데이트합니다.
-            }
-          ></Checkbox>
-          <Label>관로 표준공사비 산정 프로그램</Label>
-          <Button
-            color="green"
-            size={"sm"}
-            onClick={zipDowonLoad}
-            className="bg-none ml-6"
-          >
-            다운로드
-          </Button>
+          {!isSim && (
+            <>
+              <Button
+                className="mr-3"
+                size={"sm"}
+                onClick={activeForm.handleSubmit(onSubmit)}
+                disabled={readonly}
+              >
+                저장
+              </Button>
+              <Label>검토완료</Label>
+              <Checkbox
+                className="ml-3 mr-6"
+                checked={checkFinish}
+                onCheckedChange={(checked) => {
+                  if (readonly) return;
+                  setCheckFinish(checked === true);
+                }}
+              />
+            </>
+          )}
+          {!isSim && (
+            <>
+            <Label>관로 표준공사비 산정 프로그램</Label>
+            <Button color="green" size={"sm"} onClick={zipDowonLoad} className="bg-none ml-6">
+              다운로드
+            </Button>
+            </>
+          )}
         </div>
         <div className="col-span-12 ml-4 mr-4">
           <h1 className={formH1Class}>기본사항</h1>
@@ -371,25 +393,33 @@ export default function ConCostForm({
         <div className="grid grid-cols-12 gap-4 ml-4 mr-4">
           <div className="col-span-3 mt-4">
             <FormField
-              control={form.control}
+              control={activeForm.control}
               name="useUsgCd"
               render={({ field }) => (
                 <FormUi label="용도">
-                  <Input
-                    placeholder=""
-                    type="text"
-                    onChange={field.onChange}
-                    value={useUsgCdLabel}
-                    readOnly
-                    className={readOnlyInputClass}
-                  />
+                  {isSim ? (
+                    <SelectBox
+                      label=""
+                      selectArray={code.sewageOutFclttUse || []}
+                      onSelectValue={field.onChange}
+                      value={field.value}
+                    />
+                  ) : (
+                    <Input
+                      placeholder=""
+                      type="text"
+                      value={useUsgCdLabel}
+                      readOnly
+                      className={readOnlyInputClass}
+                    />
+                  )}
                 </FormUi>
               )}
             />
           </div>
           <div className="col-span-3 mt-4">
             <FormField
-              control={form.control}
+              control={activeForm.control}
               name="dmndQty"
               render={({ field }) => (
                 <FormUi label="요구수량(m³/일)">
@@ -401,8 +431,8 @@ export default function ConCostForm({
                       field.onChange(Number(e.target.value));
                     }}
                     value={field.value ?? 0}
-                    readOnly={true}
-                    className={readOnlyInputClass}
+                    readOnly={!isSim}
+                    className={!isSim ? readOnlyInputClass : ""}
                   />
                 </FormUi>
               )}
@@ -439,7 +469,7 @@ export default function ConCostForm({
               bodyClassName={"w-[25vw] max-w-none"}
             ></PopoverUi>
             <FormField
-              control={form.control}
+              control={activeForm.control}
               name="demandCst.usgPrcsProcs"
               render={({ field }) => (
                 <FormUi label="">
@@ -457,7 +487,7 @@ export default function ConCostForm({
           </div>
           <div className="col-span-3 mt-4">
             <FormField
-              control={form.control}
+              control={activeForm.control}
               name="dmndQty"
               render={({ field }) => (
                 <FormUi label="처리시설용량(m³/일)">
@@ -502,7 +532,7 @@ export default function ConCostForm({
               ></PopoverUi>
             </div>
             <FormField
-              control={form.control}
+              control={activeForm.control}
               name="demandCst.prcsFcltCpctCstrnCst"
               render={({ field }) => (
                 <FormUi label="">
@@ -540,7 +570,7 @@ export default function ConCostForm({
               ></PopoverUi>
             </div>
             <FormField
-              control={form.control}
+              control={activeForm.control}
               name="demandCst.fcltSbsdCstrnCst"
               render={({ field }) => (
                 <FormUi label="">
@@ -585,7 +615,7 @@ export default function ConCostForm({
               bodyClassName={"w-[22vw]"}
             ></PopoverUi>
             <FormField
-              control={form.control}
+              control={activeForm.control}
               name="totalConstCost"
               render={({ field }) => (
                 <FormUi label="">
@@ -604,35 +634,28 @@ export default function ConCostForm({
               )}
             />
           </div>
-          <div className="col-span-3 mt-4">
-            <div className="flex items-center justify-between">
-              <Label>공급처 선정</Label>
-              <Button
-                size={"sm"}
-                onClick={(e) => {
-                  searchCandidate(e);
- 
-                  //splyList => 해당객체가 대민에서 선택한 후보처 리스트
-                  //setLastSub => 해당 스테이트가 선택한 마지막 후보처를 넣어야하는 스테이트
-                }}
-                className="bg-none"
-              >
-                후보지 조회
-              </Button>
+          {form && (
+            <div className="col-span-3 mt-4">
+              <div className="flex items-center justify-between">
+                <Label>공급처 선정</Label>
+                <Button size={"sm"} onClick={searchCandidate} className="bg-none">
+                  후보지 조회
+                </Button>
+              </div>
+              <FormUi label="">
+                <Input
+                  placeholder=""
+                  type="text"
+                  value={lastSub?.ruseUtztnFcltNm || ""}
+                  readOnly
+                  className={readOnlyInputClass}
+                />
+              </FormUi>
             </div>
-            <FormUi label="">
-              <Input
-                placeholder=""
-                type="text"
-                value={lastSub?.ruseUtztnFcltNm || ""}
-                readOnly
-                className={readOnlyInputClass}
-              />
-            </FormUi>
-          </div>
+          )}
           <div className="col-span-3 mt-4">
             <FormField
-              control={form.control}
+              control={activeForm.control}
               name="demandCst.cstrnCst"
               render={({ field }) => (
                 <FormUi label="공급관로 표준공사비（백만원）">
@@ -641,7 +664,7 @@ export default function ConCostForm({
                     type="number"
                     step="0.01"
                     onChange={(e) => {
-                      if (readonly) return;
+                      if (readonly && !isSim) return;
 
                       field.onChange(Number(e.target.value));
                     }}