diff --git a/src/app/api/inventory/actions.ts b/src/app/api/inventory/actions.ts
index fab5c80..3160ef3 100644
--- a/src/app/api/inventory/actions.ts
+++ b/src/app/api/inventory/actions.ts
@@ -28,6 +28,7 @@ export interface SearchInventory extends Pageable {
   code: string;
   name: string;
   type: string;
+  lotNo?: string;
 }
 
 export interface InventoryResultByPage {
diff --git a/src/components/InventorySearch/InventoryLotLineTable.tsx b/src/components/InventorySearch/InventoryLotLineTable.tsx
index 3df6219..c6f9c6b 100644
--- a/src/components/InventorySearch/InventoryLotLineTable.tsx
+++ b/src/components/InventorySearch/InventoryLotLineTable.tsx
@@ -51,6 +51,7 @@ interface Props {
     pagingController: typeof defaultPagingController;
     totalCount: number;
     inventory: InventoryResult | null;
+    filterLotNo?: string;
     onStockTransferSuccess?: () => void | Promise<void>;
     printerCombo?: PrinterCombo[];
     onStockAdjustmentSuccess?: () => void | Promise<void>;
@@ -58,6 +59,7 @@ interface Props {
 
 const InventoryLotLineTable: React.FC<Props> = ({
   inventoryLotLines, pagingController, setPagingController, totalCount, inventory,
+  filterLotNo,
   onStockTransferSuccess, printerCombo = [],
   onStockAdjustmentSuccess,
 }) => {
@@ -108,10 +110,12 @@ const InventoryLotLineTable: React.FC<Props> = ({
         }
     }, [addEntryModalOpen]);
 
-    const availableLotLines = useMemo(
-        () => (inventoryLotLines ?? []).filter((line) => line.status?.toLowerCase() === "available"),
-        [inventoryLotLines]
-    );
+    const availableLotLines = useMemo(() => {
+        const base = (inventoryLotLines ?? []).filter((line) => line.status?.toLowerCase() === "available");
+        const f = filterLotNo?.trim?.() ? filterLotNo.trim() : '';
+        if (!f) return base;
+        return base.filter((line) => line.lotNo === f);
+    }, [inventoryLotLines, filterLotNo]);
     const originalQty = selectedLotLine?.availableQty || 0;
     const remainingQty = originalQty - qtyToBeTransferred;
 
diff --git a/src/components/InventorySearch/InventorySearch.tsx b/src/components/InventorySearch/InventorySearch.tsx
index c919510..3fb389b 100644
--- a/src/components/InventorySearch/InventorySearch.tsx
+++ b/src/components/InventorySearch/InventorySearch.tsx
@@ -7,7 +7,9 @@ import { uniq, uniqBy } from 'lodash';
 import InventoryTable from './InventoryTable';
 import { defaultPagingController } from '../SearchResults/SearchResults';
 import InventoryLotLineTable from './InventoryLotLineTable';
+import { useQrCodeScannerContext } from '@/components/QrCodeScannerProvider/QrCodeScannerProvider';
 import {
+  analyzeQrCode,
   SearchInventory,
   SearchInventoryLotLine,
   fetchInventories,
@@ -68,6 +70,15 @@ const InventorySearch: React.FC<Props> = ({ inventories, printerCombo }) => {
   const [inventoryLotLinesPagingController, setInventoryLotLinesPagingController] = useState(defaultPagingController)
   const [inventoryLotLinesTotalCount, setInventoryLotLinesTotalCount] = useState(0)
 
+  // Scan-mode UI (hardware QR scanner via QrCodeScannerProvider)
+  const qrScanner = useQrCodeScannerContext();
+  const [scanUiMode, setScanUiMode] = useState<'idle' | 'scanning'>('idle');
+  const [scanHoverCancel, setScanHoverCancel] = useState(false);
+
+  // Resolved lot no for filtering
+  const [lotNoFilter, setLotNoFilter] = useState('');
+  const [scannedItemId, setScannedItemId] = useState<number | null>(null);
+
   // Opening inventory (pure opening stock for items without existing inventory)
   const [openingItems, setOpeningItems] = useState<ItemCombo[]>([]);
   const [openingModalOpen, setOpeningModalOpen] = useState(false);
@@ -122,6 +133,7 @@ const InventorySearch: React.FC<Props> = ({ inventories, printerCombo }) => {
       query: Record<SearchParamNames, string>,
       actionType: 'reset' | 'search' | 'paging' | 'init',
       pagingController: typeof defaultPagingController,
+      lotNo: string,
     ) => {
       console.log('%c Action Type 1.', 'color:red', actionType);
       // Avoid loading data again
@@ -134,6 +146,7 @@ const InventorySearch: React.FC<Props> = ({ inventories, printerCombo }) => {
         code: query?.itemCode ?? '',
         name: query?.itemName ?? '',
         type: query?.itemType.toLowerCase() === 'all' ? '' : query?.itemType ?? '',
+        lotNo: lotNo?.trim() ? lotNo.trim() : undefined,
         pageNum: pagingController.pageNum - 1,
         pageSize: pagingController.pageSize,
       };
@@ -154,19 +167,21 @@ const InventorySearch: React.FC<Props> = ({ inventories, printerCombo }) => {
             );
         }
       }
+
+      return response;
     },
     [],
   );
 
   useEffect(() => {
-    refetchInventoryData(defaultInputs, 'init', defaultPagingController);
+    refetchInventoryData(defaultInputs, 'init', defaultPagingController, '');
   }, [defaultInputs, refetchInventoryData]);
 
   useEffect(() => {
     // if (!isEqual(inventoriesPagingController, defaultPagingController)) {
-      refetchInventoryData(inputs, 'paging', inventoriesPagingController)
+      refetchInventoryData(inputs, 'paging', inventoriesPagingController, lotNoFilter)
     // }
-  }, [inventoriesPagingController])
+  }, [inventoriesPagingController, inputs, lotNoFilter, refetchInventoryData])
 
   // Inventory Lot Line
   const refetchInventoryLotLineData = useCallback(
@@ -217,14 +232,20 @@ const InventorySearch: React.FC<Props> = ({ inventories, printerCombo }) => {
 
   // Reset
   const onReset = useCallback(() => {
-    refetchInventoryData(defaultInputs, 'reset', defaultPagingController);
+    refetchInventoryData(defaultInputs, 'reset', defaultPagingController, '');
     refetchInventoryLotLineData(null, 'reset', defaultPagingController);
     // setFilteredInventories(inventories);
 
+    setLotNoFilter('');
+    setScannedItemId(null);
+    setScanUiMode('idle');
+    setScanHoverCancel(false);
+    qrScanner.stopScan();
+    qrScanner.resetScan();
     setInputs(() => defaultInputs)
     setInventoriesPagingController(() => defaultPagingController)
     setInventoryLotLinesPagingController(() => defaultPagingController)
-  }, []);
+  }, [defaultInputs, qrScanner, refetchInventoryData, refetchInventoryLotLineData]);
 
   // Click Row
   const onInventoryRowClick = useCallback(
@@ -239,16 +260,86 @@ const InventorySearch: React.FC<Props> = ({ inventories, printerCombo }) => {
   // On Search
   const onSearch = useCallback(
     (query: Record<SearchParamNames, string>) => {
-      refetchInventoryData(query, 'search', defaultPagingController);
+      setLotNoFilter('');
+      setScannedItemId(null);
+      setScanUiMode('idle');
+      setScanHoverCancel(false);
+      qrScanner.stopScan();
+      qrScanner.resetScan();
+      refetchInventoryData(query, 'search', defaultPagingController, '');
       refetchInventoryLotLineData(null, 'search', defaultPagingController);
 
       setInputs(() => query);
       setInventoriesPagingController(() => defaultPagingController);
       setInventoryLotLinesPagingController(() => defaultPagingController);
     },
-    [refetchInventoryData, refetchInventoryLotLineData],
+    [qrScanner, refetchInventoryData, refetchInventoryLotLineData],
   );
 
+  const startLotScan = useCallback(() => {
+    setScanHoverCancel(false);
+    setScanUiMode('scanning');
+    qrScanner.resetScan();
+    qrScanner.startScan();
+  }, [qrScanner]);
+
+  const cancelLotScan = useCallback(() => {
+    qrScanner.stopScan();
+    qrScanner.resetScan();
+    setScanUiMode('idle');
+    setScanHoverCancel(false);
+  }, [qrScanner]);
+
+  useEffect(() => {
+    if (scanUiMode !== 'scanning') return;
+
+    const itemId = qrScanner.result?.itemId;
+    const stockInLineId = qrScanner.result?.stockInLineId;
+    if (!itemId || !stockInLineId) return;
+
+    (async () => {
+      try {
+        const res = await analyzeQrCode({
+          itemId: Number(itemId),
+          stockInLineId: Number(stockInLineId),
+        });
+
+        const resolvedLotNo = res?.scanned?.lotNo?.trim?.() ? res.scanned.lotNo.trim() : '';
+        if (!resolvedLotNo) return;
+
+        setLotNoFilter(resolvedLotNo);
+        setScannedItemId(res?.itemId ?? Number(itemId));
+
+        const invRes = await refetchInventoryData(inputs, 'search', defaultPagingController, resolvedLotNo);
+        const records = invRes?.records ?? [];
+        const target = records.find((r) => r.itemId === (res?.itemId ?? Number(itemId))) ?? null;
+
+        if (target) {
+          onInventoryRowClick(target);
+        } else {
+          refetchInventoryLotLineData(null, 'search', defaultPagingController);
+          setSelectedInventory(null);
+        }
+
+        setInventoriesPagingController(() => defaultPagingController);
+        setInventoryLotLinesPagingController(() => defaultPagingController);
+      } catch (e) {
+        console.error('Failed to analyze QR code:', e);
+      } finally {
+        // Always go back to initial state after a scan attempt
+        cancelLotScan();
+      }
+    })();
+  }, [
+    cancelLotScan,
+    inputs,
+    onInventoryRowClick,
+    qrScanner.result,
+    refetchInventoryData,
+    refetchInventoryLotLineData,
+    scanUiMode,
+  ]);
+
   console.log('', 'color: #666', inventoriesPagingController);
 
   const handleOpenOpeningInventoryModal = useCallback(() => {
@@ -360,13 +451,30 @@ const InventorySearch: React.FC<Props> = ({ inventories, printerCombo }) => {
         }}
         onReset={onReset}
         extraActions={
-          <Button
-            variant="outlined"
-            color="secondary"
-            onClick={handleOpenOpeningInventoryModal}
-          >
-            {t('Add entry for items without inventory')}
-          </Button>
+          <Box sx={{ display: 'flex', gap: 1, alignItems: 'center', flexWrap: 'wrap' }}>
+            {scanUiMode === 'idle' ? (
+              <Button variant="contained" onClick={startLotScan}>
+                {t('Search lot by QR code')}
+              </Button>
+            ) : (
+              <>
+                <Button variant="contained" disabled sx={{ bgcolor: 'grey.400', color: 'grey.800' }}>
+                  {t('Please scan...')}
+                </Button>
+                <Button variant="contained" color="error" onClick={cancelLotScan}>
+                  {t('Stop QR Scan')}
+                </Button>
+              </>
+            )}
+
+            <Button
+              variant="outlined"
+              color="secondary"
+              onClick={handleOpenOpeningInventoryModal}
+            >
+              {t('Add entry for items without inventory')}
+            </Button>
+          </Box>
         }
       />
       <InventoryTable
@@ -382,6 +490,7 @@ const InventorySearch: React.FC<Props> = ({ inventories, printerCombo }) => {
         setPagingController={setInventoryLotLinesPagingController}
         totalCount={inventoryLotLinesTotalCount}
         inventory={selectedInventory}
+        filterLotNo={lotNoFilter}
         printerCombo={printerCombo ?? []}
         onStockTransferSuccess={() =>
           refetchInventoryLotLineData(
diff --git a/src/i18n/zh/inventory.json b/src/i18n/zh/inventory.json
index b6b53df..3e71239 100644
--- a/src/i18n/zh/inventory.json
+++ b/src/i18n/zh/inventory.json
@@ -272,6 +272,9 @@
   "Add entry for items without inventory": "為無庫存貨品新增倉存",
   "Enter item code or name to search": "輸入貨品編號或名稱以搜索",
   "Current Stock": "現有庫存",
+  "Search lot by QR code": "尋找批次(掃描二維碼)",
+  "Please scan...": "請掃描...",
+  "Stop QR Scan": "停止掃碼",
   "No Data": "沒有數據"
 
 }