diff --git a/frontend/components/admin/dashboard/widgets/yard-3d/YardEditor.tsx b/frontend/components/admin/dashboard/widgets/yard-3d/YardEditor.tsx
index 87319916..a9fea2f3 100644
--- a/frontend/components/admin/dashboard/widgets/yard-3d/YardEditor.tsx
+++ b/frontend/components/admin/dashboard/widgets/yard-3d/YardEditor.tsx
@@ -65,7 +65,17 @@ export default function YardEditor({ layout, onBack }: YardEditorProps) {
         setIsLoading(true);
         const response = await yardLayoutApi.getPlacementsByLayoutId(layout.id);
         if (response.success) {
-          const loadedData = response.data as YardPlacement[];
+          const loadedData = (response.data as YardPlacement[]).map((p) => ({
+            ...p,
+            // 문자열로 저장된 숫자 필드를 숫자로 변환
+            position_x: Number(p.position_x),
+            position_y: Number(p.position_y),
+            position_z: Number(p.position_z),
+            size_x: Number(p.size_x),
+            size_y: Number(p.size_y),
+            size_z: Number(p.size_z),
+            quantity: p.quantity !== null && p.quantity !== undefined ? Number(p.quantity) : null,
+          }));
           setPlacements(loadedData);
           setOriginalPlacements(JSON.parse(JSON.stringify(loadedData))); // 깊은 복사
         }