diff --git a/frontend/lib/registry/components/select-basic/SelectBasicComponent.tsx b/frontend/lib/registry/components/select-basic/SelectBasicComponent.tsx
index c2d4bcb3..7e905912 100644
--- a/frontend/lib/registry/components/select-basic/SelectBasicComponent.tsx
+++ b/frontend/lib/registry/components/select-basic/SelectBasicComponent.tsx
@@ -55,6 +55,25 @@ const SelectBasicComponent: React.FC<SelectBasicComponentProps> = ({
   // webTypeConfig 또는 componentConfig 사용 (DynamicWebTypeRenderer 호환성)
   const config = (props as any).webTypeConfig || componentConfig || {};
 
+  // 🆕 multiple 값: props.multiple (spread된 값) > config.multiple 순서로 우선순위
+  const isMultiple = (props as any).multiple ?? config?.multiple ?? false;
+
+  // 🔍 디버깅: config 및 multiple 확인
+  useEffect(() => {
+    console.log("🔍 [SelectBasicComponent] config 및 multiple 확인:", {
+      componentId: component.id,
+      "config (전체)": config,
+      "config.multiple": config?.multiple,
+      "props.multiple": (props as any).multiple,
+      "componentConfig (prop)": componentConfig,
+      "componentConfig.multiple": componentConfig?.multiple,
+      "component.componentConfig": component.componentConfig,
+      "component.componentConfig.multiple": component.componentConfig?.multiple,
+      "webTypeConfig": (props as any).webTypeConfig,
+      "최종 isMultiple 값": isMultiple,
+    });
+  }, [(props as any).multiple, config?.multiple, componentConfig?.multiple, component.componentConfig?.multiple]);
+
   // webType에 따른 세부 타입 결정 (TextInputComponent와 동일한 방식)
   const webType = component.componentConfig?.webType || "select";
 
@@ -65,7 +84,7 @@ const SelectBasicComponent: React.FC<SelectBasicComponentProps> = ({
   // multiselect의 경우 배열로 관리 (콤마 구분자로 파싱)
   const [selectedValues, setSelectedValues] = useState<string[]>(() => {
     const initialValue = externalValue || config?.value || "";
-    if (config?.multiple && typeof initialValue === "string" && initialValue) {
+    if (isMultiple && typeof initialValue === "string" && initialValue) {
       return initialValue.split(",").map(v => v.trim()).filter(v => v);
     }
     return [];
@@ -124,12 +143,12 @@ const SelectBasicComponent: React.FC<SelectBasicComponentProps> = ({
       setSelectedValue(newValue);
       
       // 다중선택 모드인 경우 selectedValues도 업데이트
-      if (config?.multiple && typeof newValue === "string" && newValue) {
+      if (isMultiple && typeof newValue === "string" && newValue) {
         const values = newValue.split(",").map(v => v.trim()).filter(v => v);
         setSelectedValues(values);
       }
     }
-  }, [externalValue, config?.value, config?.multiple]);
+  }, [externalValue, config?.value, isMultiple]);
 
   // ✅ React Query가 자동으로 처리하므로 복잡한 전역 상태 관리 제거
   // - 캐싱: React Query가 자동 관리 (10분 staleTime, 30분 gcTime)
@@ -513,7 +532,7 @@ const SelectBasicComponent: React.FC<SelectBasicComponentProps> = ({
 
     // select (기본 선택박스)
     // 다중선택 모드인 경우
-    if (config?.multiple) {
+    if (isMultiple) {
       return (
         <div className="w-full">
           <div