diff --git a/frontend/components/admin/dashboard/widgets/yard-3d/MaterialEditPanel.tsx b/frontend/components/admin/dashboard/widgets/yard-3d/MaterialEditPanel.tsx
index d2388711..a909a195 100644
--- a/frontend/components/admin/dashboard/widgets/yard-3d/MaterialEditPanel.tsx
+++ b/frontend/components/admin/dashboard/widgets/yard-3d/MaterialEditPanel.tsx
@@ -49,9 +49,6 @@ export default function MaterialEditPanel({ placement, onClose, onUpdate, onRemo
   useEffect(() => {
     if (placement) {
       setEditData({
-        position_x: placement.position_x,
-        position_y: placement.position_y,
-        position_z: placement.position_z,
         size_x: placement.size_x,
         size_y: placement.size_y,
         size_z: placement.size_z,
@@ -107,52 +104,6 @@ export default function MaterialEditPanel({ placement, onClose, onUpdate, onRemo
         <div className="space-y-3">
           <div className="text-xs font-medium text-gray-500">배치 정보 (편집 가능)</div>
 
-          {/* 3D 위치 */}
-          <div>
-            <Label className="text-xs">위치</Label>
-            <div className="grid grid-cols-3 gap-2">
-              <div>
-                <Label htmlFor="edit-posX" className="text-xs text-gray-600">
-                  X
-                </Label>
-                <Input
-                  id="edit-posX"
-                  type="number"
-                  value={editData.position_x ?? placement.position_x}
-                  onChange={(e) => setEditData({ ...editData, position_x: parseFloat(e.target.value) || 0 })}
-                  step="0.5"
-                  className="h-8 text-xs"
-                />
-              </div>
-              <div>
-                <Label htmlFor="edit-posY" className="text-xs text-gray-600">
-                  Y
-                </Label>
-                <Input
-                  id="edit-posY"
-                  type="number"
-                  value={editData.position_y ?? placement.position_y}
-                  onChange={(e) => setEditData({ ...editData, position_y: parseFloat(e.target.value) || 0 })}
-                  step="0.5"
-                  className="h-8 text-xs"
-                />
-              </div>
-              <div>
-                <Label htmlFor="edit-posZ" className="text-xs text-gray-600">
-                  Z
-                </Label>
-                <Input
-                  id="edit-posZ"
-                  type="number"
-                  value={editData.position_z ?? placement.position_z}
-                  onChange={(e) => setEditData({ ...editData, position_z: parseFloat(e.target.value) || 0 })}
-                  step="0.5"
-                  className="h-8 text-xs"
-                />
-              </div>
-            </div>
-          </div>
-
           {/* 3D 크기 */}
           <div>
             <Label className="text-xs">크기</Label>
@@ -167,7 +118,7 @@ export default function MaterialEditPanel({ placement, onClose, onUpdate, onRemo
                   value={editData.size_x ?? placement.size_x}
                   onChange={(e) => setEditData({ ...editData, size_x: parseFloat(e.target.value) || 1 })}
                   min="1"
-                  step="0.5"
+                  step="1"
                   className="h-8 text-xs"
                 />
               </div>
@@ -181,7 +132,7 @@ export default function MaterialEditPanel({ placement, onClose, onUpdate, onRemo
                   value={editData.size_y ?? placement.size_y}
                   onChange={(e) => setEditData({ ...editData, size_y: parseFloat(e.target.value) || 1 })}
                   min="1"
-                  step="0.5"
+                  step="1"
                   className="h-8 text-xs"
                 />
               </div>
@@ -195,7 +146,7 @@ export default function MaterialEditPanel({ placement, onClose, onUpdate, onRemo
                   value={editData.size_z ?? placement.size_z}
                   onChange={(e) => setEditData({ ...editData, size_z: parseFloat(e.target.value) || 1 })}
                   min="1"
-                  step="0.5"
+                  step="1"
                   className="h-8 text-xs"
                 />
               </div>
diff --git a/frontend/components/admin/dashboard/widgets/yard-3d/YardEditor.tsx b/frontend/components/admin/dashboard/widgets/yard-3d/YardEditor.tsx
index 1d93f6a9..9c85799e 100644
--- a/frontend/components/admin/dashboard/widgets/yard-3d/YardEditor.tsx
+++ b/frontend/components/admin/dashboard/widgets/yard-3d/YardEditor.tsx
@@ -62,10 +62,15 @@ export default function YardEditor({ layout, onBack }: YardEditorProps) {
   const [placements, setPlacements] = useState<YardPlacement[]>([]);
   const [materials, setMaterials] = useState<TempMaterial[]>([]);
   const [selectedPlacement, setSelectedPlacement] = useState<YardPlacement | null>(null);
-  const [selectedMaterial, setSelectedMaterial] = useState<TempMaterial | null>(null);
   const [isLoading, setIsLoading] = useState(true);
   const [isSaving, setIsSaving] = useState(false);
   const [searchTerm, setSearchTerm] = useState("");
+  const [editValues, setEditValues] = useState({
+    size_x: 5,
+    size_y: 5,
+    size_z: 5,
+    color: "#3b82f6",
+  });
 
   // 배치 목록 & 자재 목록 로드
   useEffect(() => {
@@ -78,10 +83,10 @@ export default function YardEditor({ layout, onBack }: YardEditorProps) {
         ]);
 
         if (placementsRes.success) {
-          setPlacements(placementsRes.data);
+          setPlacements(placementsRes.data as YardPlacement[]);
         }
         if (materialsRes.success) {
-          setMaterials(materialsRes.data);
+          setMaterials(materialsRes.data as TempMaterial[]);
         }
       } catch (error) {
         console.error("데이터 로드 실패:", error);
@@ -93,6 +98,18 @@ export default function YardEditor({ layout, onBack }: YardEditorProps) {
     loadData();
   }, [layout.id]);
 
+  // selectedPlacement 변경 시 editValues 업데이트
+  useEffect(() => {
+    if (selectedPlacement) {
+      setEditValues({
+        size_x: selectedPlacement.size_x,
+        size_y: selectedPlacement.size_y,
+        size_z: selectedPlacement.size_z,
+        color: selectedPlacement.color,
+      });
+    }
+  }, [selectedPlacement]);
+
   // 자재 클릭 → 배치 추가
   const handleMaterialClick = async (material: TempMaterial) => {
     // 이미 배치되었는지 확인
@@ -102,8 +119,6 @@ export default function YardEditor({ layout, onBack }: YardEditorProps) {
       return;
     }
 
-    setSelectedMaterial(material);
-
     // 기본 위치에 배치
     const placementData = {
       external_material_id: `TEMP-${material.id}`,
@@ -123,11 +138,10 @@ export default function YardEditor({ layout, onBack }: YardEditorProps) {
     try {
       const response = await yardLayoutApi.addMaterialPlacement(layout.id, placementData);
       if (response.success) {
-        setPlacements((prev) => [...prev, response.data]);
-        setSelectedPlacement(response.data);
-        setSelectedMaterial(null);
+        setPlacements((prev) => [...prev, response.data as YardPlacement]);
+        setSelectedPlacement(response.data as YardPlacement);
       }
-    } catch (error: any) {
+    } catch (error) {
       console.error("자재 배치 실패:", error);
       alert("자재 배치에 실패했습니다.");
     }
@@ -262,7 +276,7 @@ export default function YardEditor({ layout, onBack }: YardEditorProps) {
             <Yard3DCanvas
               placements={placements}
               selectedPlacementId={selectedPlacement?.id || null}
-              onPlacementClick={setSelectedPlacement}
+              onPlacementClick={(placement) => setSelectedPlacement(placement as YardPlacement)}
               onPlacementDrag={handlePlacementDrag}
             />
           )}
@@ -304,60 +318,18 @@ export default function YardEditor({ layout, onBack }: YardEditorProps) {
                   <div className="space-y-3 border-t pt-4">
                     <Label className="text-sm font-semibold">배치 정보</Label>
 
-                    <div className="grid grid-cols-3 gap-2">
-                      <div>
-                        <Label className="text-xs">X</Label>
-                        <Input
-                          type="number"
-                          step="0.5"
-                          value={selectedPlacement.position_x}
-                          onChange={(e) =>
-                            handlePlacementUpdate(selectedPlacement.id, {
-                              position_x: parseFloat(e.target.value),
-                            })
-                          }
-                        />
-                      </div>
-                      <div>
-                        <Label className="text-xs">Y</Label>
-                        <Input
-                          type="number"
-                          step="0.5"
-                          value={selectedPlacement.position_y}
-                          onChange={(e) =>
-                            handlePlacementUpdate(selectedPlacement.id, {
-                              position_y: parseFloat(e.target.value),
-                            })
-                          }
-                        />
-                      </div>
-                      <div>
-                        <Label className="text-xs">Z</Label>
-                        <Input
-                          type="number"
-                          step="0.5"
-                          value={selectedPlacement.position_z}
-                          onChange={(e) =>
-                            handlePlacementUpdate(selectedPlacement.id, {
-                              position_z: parseFloat(e.target.value),
-                            })
-                          }
-                        />
-                      </div>
-                    </div>
-
                     <div className="grid grid-cols-3 gap-2">
                       <div>
                         <Label className="text-xs">너비</Label>
                         <Input
                           type="number"
                           step="1"
-                          value={selectedPlacement.size_x}
-                          onChange={(e) =>
-                            handlePlacementUpdate(selectedPlacement.id, {
-                              size_x: parseFloat(e.target.value),
-                            })
-                          }
+                          value={editValues.size_x}
+                          onChange={(e) => {
+                            const newValue = parseFloat(e.target.value) || 1;
+                            setEditValues((prev) => ({ ...prev, size_x: newValue }));
+                            handlePlacementUpdate(selectedPlacement.id, { size_x: newValue });
+                          }}
                         />
                       </div>
                       <div>
@@ -365,12 +337,12 @@ export default function YardEditor({ layout, onBack }: YardEditorProps) {
                         <Input
                           type="number"
                           step="1"
-                          value={selectedPlacement.size_y}
-                          onChange={(e) =>
-                            handlePlacementUpdate(selectedPlacement.id, {
-                              size_y: parseFloat(e.target.value),
-                            })
-                          }
+                          value={editValues.size_y}
+                          onChange={(e) => {
+                            const newValue = parseFloat(e.target.value) || 1;
+                            setEditValues((prev) => ({ ...prev, size_y: newValue }));
+                            handlePlacementUpdate(selectedPlacement.id, { size_y: newValue });
+                          }}
                         />
                       </div>
                       <div>
@@ -378,12 +350,12 @@ export default function YardEditor({ layout, onBack }: YardEditorProps) {
                         <Input
                           type="number"
                           step="1"
-                          value={selectedPlacement.size_z}
-                          onChange={(e) =>
-                            handlePlacementUpdate(selectedPlacement.id, {
-                              size_z: parseFloat(e.target.value),
-                            })
-                          }
+                          value={editValues.size_z}
+                          onChange={(e) => {
+                            const newValue = parseFloat(e.target.value) || 1;
+                            setEditValues((prev) => ({ ...prev, size_z: newValue }));
+                            handlePlacementUpdate(selectedPlacement.id, { size_z: newValue });
+                          }}
                         />
                       </div>
                     </div>
@@ -392,8 +364,11 @@ export default function YardEditor({ layout, onBack }: YardEditorProps) {
                       <Label className="text-xs">색상</Label>
                       <Input
                         type="color"
-                        value={selectedPlacement.color}
-                        onChange={(e) => handlePlacementUpdate(selectedPlacement.id, { color: e.target.value })}
+                        value={editValues.color}
+                        onChange={(e) => {
+                          setEditValues((prev) => ({ ...prev, color: e.target.value }));
+                          handlePlacementUpdate(selectedPlacement.id, { color: e.target.value });
+                        }}
                       />
                     </div>
                   </div>