diff --git a/apps/as/src/entities/cklst/model/cklst-mng-interface.ts b/apps/as/src/entities/cklst/model/cklst-mng-interface.ts
index 7e3187ce7..f6c80e630 100644
--- a/apps/as/src/entities/cklst/model/cklst-mng-interface.ts
+++ b/apps/as/src/entities/cklst/model/cklst-mng-interface.ts
@@ -24,6 +24,8 @@ export interface CklstTreeNode {
   rvwCn: string;
   bchckUseYn: "Y" | "N";
   sortSeq: number;
+  // optional: backend may include the taskSeComCd per node
+  taskSeComCd?: string;
 }
 
 export interface CklstTreeSearchParams {
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 e134746d1..dd042ef29 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
@@ -111,6 +111,13 @@ const getRoleStepCount = (dtlInstCd?: string): number => {
   return mapped ? REVIEW_STEP_ROLE_RANK[mapped] : 0;
 };
 
+// 업무구분 코드 -> 표시명 매핑 (체크리스트 그룹 표시용)
+const TASK_CODE_LABELS: Record<string, string> = {
+  RE: "재이용수",
+  SP: "하수관로",
+  SF: "하수처리시설",
+};
+
 const normalizeChecklistResultRows = (payload: any): any[] => {
   // expect flat `cklstResultList` only
   const raw = payload?.cklstResultList ?? [];
@@ -175,6 +182,7 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
     return visibleReviewStepCodes.includes(step) ? step : null;
   }, [isModifyMode, userInfo?.dtlInstCd, visibleReviewStepCodes]);
   const [selectedReviewStep, setSelectedReviewStep] = useState<ReviewStepCode>("LOCAL");
+  
 
   useEffect(() => {
     if (visibleReviewStepCodes.length === 0) return;
@@ -245,6 +253,14 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
     staleTime: Infinity,
   });
 
+  // selected task code for header filtering (null = none selected)
+  const [selectedTaskCode, setSelectedTaskCode] = useState<string | null>(null);
+  
+  
+
+  
+
+
   const [requiredFiles, setRequiredFiles] = useState<Record<RequiredAttachKey, RequiredAttachItem>>({});
   const requiredFileInputRefs = useRef<Record<RequiredAttachKey, HTMLInputElement | null>>({});
 
@@ -608,6 +624,7 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
   const { data: cklstTree = [] } = useQuery<CklstTreeNode[]>({
     queryKey: ["cklstTree", docSeComCd, taskSeComCd],
     queryFn: async () => {
+      console.log("Fetching checklist tree with", { docSeComCd, taskSeComCd });
       // support comma-separated task codes (e.g. "RE,SP") by splitting
       const raw = taskSeComCd ?? "";
       const codes = raw
@@ -639,7 +656,9 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
     // bchckUseYn 필터 제거: 부모가 있는 자식 노드(bchckUseYn=N)도 트리에 포함
     // cklstTree 내의 피드 taskSeComCd 에 따라서 그룹핑 되도록 해줘
     
-    const useRows = cklstTree;
+    const useRows = selectedTaskCode
+      ? cklstTree.filter((r) => (r as any).taskSeComCd === selectedTaskCode)
+      : cklstTree;
     if (useRows.length === 0) return [] as CklstTreeNode[];
 
     // artcl 단위로 분리하지 않고 전체 rows에서 단일 childMap을 구성한다.
@@ -673,7 +692,26 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
     walk(null);
 
     return ordered;
-  }, [cklstTree]);
+  }, [cklstTree, selectedTaskCode]);
+
+  // when cklstTree changes, default selectedTaskCode to first available code
+  useEffect(() => {
+    const codes = Array.from(
+      new Set((cklstTree ?? []).map((r) => (r as any).taskSeComCd).filter(Boolean)),
+    );
+    console.log("Available taskSeComCd codes in checklist tree:", codes);
+
+    if (codes.length === 0) {
+      if (selectedTaskCode !== null) setSelectedTaskCode(null);
+      return;
+    }
+
+    // if there's no selection yet, or the current selection is not in the new codes,
+    // pick the first available code
+    if (!selectedTaskCode || !codes.includes(selectedTaskCode)) {
+      setSelectedTaskCode(codes[0]);
+    }
+  }, [cklstTree, selectedTaskCode]);
 
   const cklstKey = (row: CklstTreeNode, rvwStpComCd?: string) => {
     const stepCode = rvwStpComCd ?? DEFAULT_RVW_STP_COM_CD;
@@ -800,6 +838,7 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
     return { total, completed, percent };
   }, [cklstRows, checkResults, selectedReviewStep]);
 
+
   const toCklstSaveDtoList = () =>
     {
       const persistedStepCodeSet = new Set<ReviewStepCode>();
@@ -1506,9 +1545,27 @@ function CnfmRegistPage({ initialData }: { initialData?: any } = {}) {
       <div className="cnfm-card p-4">
         <div className="mb-3 flex items-center justify-between">
           <h3 className="text-[1.5rem] font-bold text-gray-700">체크리스트</h3>
-          <button className="cnfm-btn-search text-[1.2rem]">
-            {(cklstRows[0]?.cklstNm ?? taskSeComCdNm) + `(${cklstStats.completed}/${cklstStats.total})`}
-          </button>
+          <div className="flex gap-2 items-center">
+            {Array.from(new Set((cklstTree ?? []).map((r) => (r as any).taskSeComCd).filter(Boolean))).map(
+              (code) => {
+                const name = TASK_CODE_LABELS[code] ?? code;
+                const active = selectedTaskCode === code;
+                return (
+                  <button
+                    key={code}
+                    type="button"
+                    className={`rounded border px-3 py-1 text-[1.2rem] font-semibold ${
+                      active ? "border-blue-500 bg-blue-50 text-blue-700" : "border-gray-300 bg-white text-gray-600"
+                    }`}
+                    onClick={() => setSelectedTaskCode(code)}
+                  >
+                    {name}
+                  </button>
+                );
+              },
+            )}
+            <div className="text-[1.1rem] text-gray-500">{`(${cklstStats.completed}/${cklstStats.total})`}</div>
+          </div>
         </div>
         <div className="mb-3 flex flex-wrap gap-2">
           {visibleReviewStepCodes.length === 0 ? (