diff --git a/frontend/components/admin/dashboard/widgets/yard-3d/DigitalTwinEditor.tsx b/frontend/components/admin/dashboard/widgets/yard-3d/DigitalTwinEditor.tsx
index 3a4b1901..b99b58af 100644
--- a/frontend/components/admin/dashboard/widgets/yard-3d/DigitalTwinEditor.tsx
+++ b/frontend/components/admin/dashboard/widgets/yard-3d/DigitalTwinEditor.tsx
@@ -648,7 +648,14 @@ export default function DigitalTwinEditor({ layoutId, layoutName, onBack }: Digi
             description: `${loadedObjects.length}개의 객체를 불러왔습니다.`,
           });
 
-          // Location 객체들의 자재 개수 로드
+          // Location 객체들의 자재 개수 로드 (직접 dbConnectionId와 materialTableName 전달)
+          const dbConnectionId = layout.external_db_connection_id;
+          const hierarchyConfigParsed =
+            typeof layout.hierarchy_config === "string"
+              ? JSON.parse(layout.hierarchy_config)
+              : layout.hierarchy_config;
+          const materialTableName = hierarchyConfigParsed?.material?.tableName;
+          
           const locationObjects = loadedObjects.filter(
             (obj) =>
               (obj.type === "location-bed" ||
@@ -657,10 +664,10 @@ export default function DigitalTwinEditor({ layoutId, layoutName, onBack }: Digi
                 obj.type === "location-dest") &&
               obj.locaKey,
           );
-          if (locationObjects.length > 0) {
+          if (locationObjects.length > 0 && dbConnectionId && materialTableName) {
             const locaKeys = locationObjects.map((obj) => obj.locaKey!);
             setTimeout(() => {
-              loadMaterialCountsForLocations(locaKeys);
+              loadMaterialCountsForLocations(locaKeys, dbConnectionId, materialTableName);
             }, 100);
           }
         } else {
@@ -1045,11 +1052,15 @@ export default function DigitalTwinEditor({ layoutId, layoutName, onBack }: Digi
   };
 
   // Location별 자재 개수 로드 (locaKeys를 직접 받음)
-  const loadMaterialCountsForLocations = async (locaKeys: string[]) => {
-    if (!selectedDbConnection || locaKeys.length === 0) return;
+  const loadMaterialCountsForLocations = async (locaKeys: string[], dbConnectionId?: number, materialTableName?: string) => {
+    const connectionId = dbConnectionId || selectedDbConnection;
+    const tableName = materialTableName || selectedTables.material;
+    if (!connectionId || locaKeys.length === 0) return;
 
     try {
-      const response = await getMaterialCounts(selectedDbConnection, selectedTables.material, locaKeys);
+      const response = await getMaterialCounts(connectionId, tableName, locaKeys);
+      console.log("📊 자재 개수 API 응답:", response);
+      
       if (response.success && response.data) {
         // 각 Location 객체에 자재 개수 업데이트 (STP는 자재 미적재이므로 제외)
         setPlacedObjects((prev) =>
@@ -1060,13 +1071,23 @@ export default function DigitalTwinEditor({ layoutId, layoutName, onBack }: Digi
             ) {
               return obj;
             }
-            const materialCount = response.data?.find((mc) => mc.LOCAKEY === obj.locaKey);
+            // 백엔드 응답 필드명: location_key, count (대소문자 모두 체크)
+            const materialCount = response.data?.find(
+              (mc: any) => 
+                mc.LOCAKEY === obj.locaKey || 
+                mc.location_key === obj.locaKey ||
+                mc.locakey === obj.locaKey
+            );
             if (materialCount) {
+              // count 또는 material_count 필드 사용
+              const count = materialCount.count || materialCount.material_count || 0;
+              const maxLayer = materialCount.max_layer || count;
+              console.log(`📊 ${obj.locaKey}: 자재 ${count}개`);
               return {
                 ...obj,
-                materialCount: materialCount.material_count,
+                materialCount: Number(count),
                 materialPreview: {
-                  height: materialCount.max_layer * 1.5, // 층당 1.5 높이 (시각적)
+                  height: maxLayer * 1.5, // 층당 1.5 높이 (시각적)
                 },
               };
             }
diff --git a/frontend/components/admin/dashboard/widgets/yard-3d/DigitalTwinViewer.tsx b/frontend/components/admin/dashboard/widgets/yard-3d/DigitalTwinViewer.tsx
index f2445d50..91804987 100644
--- a/frontend/components/admin/dashboard/widgets/yard-3d/DigitalTwinViewer.tsx
+++ b/frontend/components/admin/dashboard/widgets/yard-3d/DigitalTwinViewer.tsx
@@ -54,15 +54,17 @@ export default function DigitalTwinViewer({ layoutId }: DigitalTwinViewerProps)
 
           // 레이아웃 정보 저장 (snake_case와 camelCase 모두 지원)
           setLayoutName(layout.layout_name || layout.layoutName);
-          setExternalDbConnectionId(layout.external_db_connection_id || layout.externalDbConnectionId);
+          const dbConnectionId = layout.external_db_connection_id || layout.externalDbConnectionId;
+          setExternalDbConnectionId(dbConnectionId);
 
           // hierarchy_config 저장
+          let hierarchyConfigData: any = null;
           if (layout.hierarchy_config) {
-            const config =
+            hierarchyConfigData =
               typeof layout.hierarchy_config === "string"
                 ? JSON.parse(layout.hierarchy_config)
                 : layout.hierarchy_config;
-            setHierarchyConfig(config);
+            setHierarchyConfig(hierarchyConfigData);
           }
 
           // 객체 데이터 변환
@@ -103,6 +105,47 @@ export default function DigitalTwinViewer({ layoutId }: DigitalTwinViewerProps)
           });
 
           setPlacedObjects(loadedObjects);
+
+          // 외부 DB 연결이 있고 자재 설정이 있으면, 각 Location의 실제 자재 개수 조회
+          if (dbConnectionId && hierarchyConfigData?.material) {
+            const locationObjects = loadedObjects.filter(
+              (obj) =>
+                (obj.type === "location-bed" || obj.type === "location-temp" || obj.type === "location-dest") &&
+                obj.locaKey
+            );
+
+            // 각 Location에 대해 자재 개수 조회 (병렬 처리)
+            const materialCountPromises = locationObjects.map(async (obj) => {
+              try {
+                const matResponse = await getMaterials(dbConnectionId, {
+                  tableName: hierarchyConfigData.material.tableName,
+                  keyColumn: hierarchyConfigData.material.keyColumn,
+                  locationKeyColumn: hierarchyConfigData.material.locationKeyColumn,
+                  layerColumn: hierarchyConfigData.material.layerColumn,
+                  locaKey: obj.locaKey!,
+                });
+                if (matResponse.success && matResponse.data) {
+                  return { id: obj.id, count: matResponse.data.length };
+                }
+              } catch (e) {
+                console.warn(`자재 개수 조회 실패 (${obj.locaKey}):`, e);
+              }
+              return { id: obj.id, count: 0 };
+            });
+
+            const materialCounts = await Promise.all(materialCountPromises);
+            
+            // materialCount 업데이트
+            setPlacedObjects((prev) =>
+              prev.map((obj) => {
+                const countData = materialCounts.find((m) => m.id === obj.id);
+                if (countData && countData.count > 0) {
+                  return { ...obj, materialCount: countData.count };
+                }
+                return obj;
+              })
+            );
+          }
         } else {
           throw new Error(response.error || "레이아웃 조회 실패");
         }
diff --git a/frontend/components/admin/dashboard/widgets/yard-3d/Yard3DCanvas.tsx b/frontend/components/admin/dashboard/widgets/yard-3d/Yard3DCanvas.tsx
index 892acc88..a3b29042 100644
--- a/frontend/components/admin/dashboard/widgets/yard-3d/Yard3DCanvas.tsx
+++ b/frontend/components/admin/dashboard/widgets/yard-3d/Yard3DCanvas.tsx
@@ -1,7 +1,7 @@
 "use client";
 
 import { Canvas, useThree } from "@react-three/fiber";
-import { OrbitControls, Grid, Box, Text } from "@react-three/drei";
+import { OrbitControls, Box, Text } from "@react-three/drei";
 import { Suspense, useRef, useState, useEffect, useMemo } from "react";
 import * as THREE from "three";
 
@@ -525,68 +525,77 @@ function MaterialBox({
       case "location-bed":
       case "location-temp":
       case "location-dest":
-        // 베드 타입 Location: 초록색 상자
+        // 베드 타입 Location: 회색 철판들이 데이터 개수만큼 쌓이는 형태
+        const locPlateCount = placement.material_count || placement.quantity || 5; // 데이터 개수
+        const locVisiblePlateCount = locPlateCount; // 데이터 개수만큼 모두 렌더링
+        const locPlateThickness = 0.15; // 각 철판 두께
+        const locPlateGap = 0.03; // 철판 사이 미세한 간격
+        // 실제 렌더링되는 폴리곤 기준으로 높이 계산
+        const locVisibleStackHeight = locVisiblePlateCount * (locPlateThickness + locPlateGap);
+        // 그룹의 position_y를 상쇄해서 바닥(y=0)부터 시작하도록
+        const locYOffset = -placement.position_y;
+        const locPlateBaseY = locYOffset + locPlateThickness / 2;
+        
         return (
           <>
-            <Box args={[boxWidth, boxHeight, boxDepth]}>
-              <meshStandardMaterial
-                color={placement.color}
-                roughness={0.5}
-                metalness={0.3}
-                emissive={isSelected ? placement.color : "#000000"}
-                emissiveIntensity={isSelected ? glowIntensity * 0.8 : 0}
-              />
-            </Box>
-
-            {/* 대표 자재 스택 (자재가 있을 때만) */}
-            {placement.material_count !== undefined &&
-              placement.material_count > 0 &&
-              placement.material_preview_height && (
+            {/* 철판 스택 - 데이터 개수만큼 회색 판 쌓기 (최대 20개) */}
+            {Array.from({ length: locVisiblePlateCount }).map((_, idx) => {
+              const yPos = locPlateBaseY + idx * (locPlateThickness + locPlateGap);
+              // 약간의 랜덤 오프셋으로 자연스러움 추가
+              const xOffset = (Math.sin(idx * 0.5) * 0.02);
+              const zOffset = (Math.cos(idx * 0.7) * 0.02);
+              
+              return (
                 <Box
-                  args={[boxWidth * 0.7, placement.material_preview_height, boxDepth * 0.7]}
-                  position={[0, boxHeight / 2 + placement.material_preview_height / 2, 0]}
+                  key={`loc-plate-${idx}`}
+                  args={[boxWidth, locPlateThickness, boxDepth]}
+                  position={[xOffset, yPos, zOffset]}
                 >
                   <meshStandardMaterial
-                    color="#ef4444"
-                    roughness={0.6}
-                    metalness={0.2}
-                    emissive={isSelected ? "#ef4444" : "#000000"}
+                    color="#6b7280" // 회색 (고정)
+                    roughness={0.4}
+                    metalness={0.7}
+                    emissive={isSelected ? "#9ca3af" : "#000000"}
                     emissiveIntensity={isSelected ? glowIntensity * 0.3 : 0}
-                    transparent
-                    opacity={0.7}
                   />
+                  {/* 각 철판 외곽선 */}
+                  <lineSegments>
+                    <edgesGeometry args={[new THREE.BoxGeometry(boxWidth, locPlateThickness, boxDepth)]} />
+                    <lineBasicMaterial color="#374151" opacity={0.8} transparent />
+                  </lineSegments>
                 </Box>
-              )}
-
-            {/* Location 이름 */}
+              );
+            })}
+            
+            {/* Location 이름 - 실제 폴리곤 높이 기준, 뒤쪽(+Z)에 배치 */}
             {placement.name && (
               <Text
-                position={[0, boxHeight / 2 + 0.3, 0]}
+                position={[0, locYOffset + locVisibleStackHeight + 0.3, boxDepth * 0.3]}
                 rotation={[-Math.PI / 2, 0, 0]}
-                fontSize={Math.min(boxWidth, boxDepth) * 0.15}
-                color="#ffffff"
+                fontSize={Math.min(boxWidth, boxDepth) * 0.18}
+                color="#374151"
                 anchorX="center"
                 anchorY="middle"
                 outlineWidth={0.03}
-                outlineColor="#000000"
+                outlineColor="#ffffff"
               >
                 {placement.name}
               </Text>
             )}
 
-            {/* 자재 개수 */}
-            {placement.material_count !== undefined && placement.material_count > 0 && (
+            {/* 수량 표시 텍스트 - 실제 폴리곤 높이 기준, 앞쪽(-Z)에 배치 */}
+            {locPlateCount > 0 && (
               <Text
-                position={[0, boxHeight / 2 + 0.6, 0]}
+                position={[0, locYOffset + locVisibleStackHeight + 0.3, -boxDepth * 0.3]}
                 rotation={[-Math.PI / 2, 0, 0]}
-                fontSize={Math.min(boxWidth, boxDepth) * 0.12}
-                color="#fbbf24"
+                fontSize={Math.min(boxWidth, boxDepth) * 0.15}
+                color="#1f2937"
                 anchorX="center"
                 anchorY="middle"
-                outlineWidth={0.03}
-                outlineColor="#000000"
+                outlineWidth={0.02}
+                outlineColor="#ffffff"
               >
-                {`자재: ${placement.material_count}개`}
+                {`${locPlateCount}장`}
               </Text>
             )}
           </>
@@ -886,83 +895,79 @@ function MaterialBox({
 
       case "plate-stack":
       default:
-        // 후판 스택: 팔레트 + 박스 (기존 렌더링)
+        // 후판 스택: 회색 철판들이 데이터 개수만큼 쌓이는 형태
+        const plateCount = placement.material_count || placement.quantity || 5; // 데이터 개수 (기본 5장)
+        const visiblePlateCount = plateCount; // 데이터 개수만큼 모두 렌더링
+        const plateThickness = 0.15; // 각 철판 두께
+        const plateGap = 0.03; // 철판 사이 미세한 간격
+        // 실제 렌더링되는 폴리곤 기준으로 높이 계산
+        const visibleStackHeight = visiblePlateCount * (plateThickness + plateGap);
+        // 그룹의 position_y를 상쇄해서 바닥(y=0)부터 시작하도록
+        const yOffset = -placement.position_y;
+        const plateBaseY = yOffset + plateThickness / 2;
+        
         return (
           <>
-            {/* 팔레트 그룹 - 박스 하단에 붙어있도록 */}
-            <group position={[0, palletYOffset, 0]}>
-              {/* 상단 가로 판자들 (5개) */}
-              {[-boxDepth * 0.4, -boxDepth * 0.2, 0, boxDepth * 0.2, boxDepth * 0.4].map((zOffset, idx) => (
+            {/* 철판 스택 - 데이터 개수만큼 회색 판 쌓기 (최대 20개) */}
+            {Array.from({ length: visiblePlateCount }).map((_, idx) => {
+              const yPos = plateBaseY + idx * (plateThickness + plateGap);
+              // 약간의 랜덤 오프셋으로 자연스러움 추가 (실제 철판처럼)
+              const xOffset = (Math.sin(idx * 0.5) * 0.02);
+              const zOffset = (Math.cos(idx * 0.7) * 0.02);
+              
+              return (
                 <Box
-                  key={`top-${idx}`}
-                  args={[boxWidth * 0.95, palletHeight * 0.3, boxDepth * 0.15]}
-                  position={[0, palletHeight * 0.35, zOffset]}
+                  key={`plate-${idx}`}
+                  args={[boxWidth, plateThickness, boxDepth]}
+                  position={[xOffset, yPos, zOffset]}
                 >
-                  <meshStandardMaterial color="#8B4513" roughness={0.95} metalness={0.0} />
+                  <meshStandardMaterial
+                    color="#6b7280" // 회색 (고정)
+                    roughness={0.4}
+                    metalness={0.7}
+                    emissive={isSelected ? "#9ca3af" : "#000000"}
+                    emissiveIntensity={isSelected ? glowIntensity * 0.3 : 0}
+                  />
+                  {/* 각 철판 외곽선 */}
                   <lineSegments>
-                    <edgesGeometry
-                      args={[new THREE.BoxGeometry(boxWidth * 0.95, palletHeight * 0.3, boxDepth * 0.15)]}
-                    />
-                    <lineBasicMaterial color="#000000" opacity={0.3} transparent />
+                    <edgesGeometry args={[new THREE.BoxGeometry(boxWidth, plateThickness, boxDepth)]} />
+                    <lineBasicMaterial color="#374151" opacity={0.8} transparent />
                   </lineSegments>
                 </Box>
-              ))}
-
-              {/* 중간 세로 받침대 (3개) */}
-              {[-boxWidth * 0.35, 0, boxWidth * 0.35].map((xOffset, idx) => (
-                <Box
-                  key={`middle-${idx}`}
-                  args={[boxWidth * 0.12, palletHeight * 0.4, boxDepth * 0.2]}
-                  position={[xOffset, 0, 0]}
-                >
-                  <meshStandardMaterial color="#654321" roughness={0.98} metalness={0.0} />
-                  <lineSegments>
-                    <edgesGeometry
-                      args={[new THREE.BoxGeometry(boxWidth * 0.12, palletHeight * 0.4, boxDepth * 0.2)]}
-                    />
-                    <lineBasicMaterial color="#000000" opacity={0.4} transparent />
-                  </lineSegments>
-                </Box>
-              ))}
-
-              {/* 하단 가로 판자들 (3개) */}
-              {[-boxDepth * 0.3, 0, boxDepth * 0.3].map((zOffset, idx) => (
-                <Box
-                  key={`bottom-${idx}`}
-                  args={[boxWidth * 0.95, palletHeight * 0.25, boxDepth * 0.18]}
-                  position={[0, -palletHeight * 0.35, zOffset]}
-                >
-                  <meshStandardMaterial color="#6B4423" roughness={0.97} metalness={0.0} />
-                  <lineSegments>
-                    <edgesGeometry
-                      args={[new THREE.BoxGeometry(boxWidth * 0.95, palletHeight * 0.25, boxDepth * 0.18)]}
-                    />
-                    <lineBasicMaterial color="#000000" opacity={0.3} transparent />
-                  </lineSegments>
-                </Box>
-              ))}
-            </group>
-
-            {/* 메인 박스 */}
-            <Box args={[boxWidth, boxHeight, boxDepth]} position={[0, 0, 0]}>
-              {/* 메인 재질 - 골판지 느낌 */}
-              <meshStandardMaterial
-                color={placement.color}
-                opacity={isConfigured ? (isSelected ? 1 : 0.8) : 0.5}
-                transparent
-                emissive={isSelected ? "#ffffff" : "#000000"}
-                emissiveIntensity={isSelected ? 0.2 : 0}
-                wireframe={!isConfigured}
-                roughness={0.95}
-                metalness={0.05}
-              />
-
-              {/* 외곽선 - 더 진하게 */}
-              <lineSegments>
-                <edgesGeometry args={[new THREE.BoxGeometry(boxWidth, boxHeight, boxDepth)]} />
-                <lineBasicMaterial color="#000000" opacity={0.6} transparent linewidth={1.5} />
-              </lineSegments>
-            </Box>
+              );
+            })}
+            
+            {/* 수량 표시 텍스트 (상단) - 앞쪽(-Z)에 배치 */}
+            {plateCount > 0 && (
+              <Text
+                position={[0, yOffset + visibleStackHeight + 0.3, -boxDepth * 0.3]}
+                rotation={[-Math.PI / 2, 0, 0]}
+                fontSize={Math.min(boxWidth, boxDepth) * 0.18}
+                color="#374151"
+                anchorX="center"
+                anchorY="middle"
+                outlineWidth={0.03}
+                outlineColor="#ffffff"
+              >
+                {`${plateCount}장`}
+              </Text>
+            )}
+            
+            {/* 자재명 표시 (있는 경우) - 뒤쪽(+Z)에 배치 */}
+            {placement.material_name && (
+              <Text
+                position={[0, yOffset + visibleStackHeight + 0.3, boxDepth * 0.3]}
+                rotation={[-Math.PI / 2, 0, 0]}
+                fontSize={Math.min(boxWidth, boxDepth) * 0.15}
+                color="#1f2937"
+                anchorX="center"
+                anchorY="middle"
+                outlineWidth={0.02}
+                outlineColor="#ffffff"
+              >
+                {placement.material_name}
+              </Text>
+            )}
           </>
         );
     }
@@ -1114,20 +1119,11 @@ function Scene({
       {/* 배경색 */}
       <color attach="background" args={["#f3f4f6"]} />
 
-      {/* 바닥 그리드 (타일을 4등분) */}
-      <Grid
-        args={[100, 100]}
-        cellSize={gridSize / 2} // 타일을 2x2로 나눔 (2.5칸)
-        cellThickness={0.6}
-        cellColor="#d1d5db" // 얇은 선 (서브 그리드) - 밝은 회색
-        sectionSize={gridSize} // 타일 경계선 (5칸마다)
-        sectionThickness={1.5}
-        sectionColor="#6b7280" // 타일 경계는 조금 어둡게
-        fadeDistance={200}
-        fadeStrength={1}
-        followCamera={false}
-        infiniteGrid={true}
-      />
+      {/* 바닥 - 단색 평면 (그리드 제거) */}
+      <mesh rotation={[-Math.PI / 2, 0, 0]} position={[0, -0.01, 0]}>
+        <planeGeometry args={[200, 200]} />
+        <meshStandardMaterial color="#e5e7eb" roughness={0.9} metalness={0.1} />
+      </mesh>
 
       {/* 자재 박스들 */}
       {placements.map((placement) => (