diff --git a/frontend/lib/registry/components/selected-items-detail-input/SelectedItemsDetailInputConfigPanel.tsx b/frontend/lib/registry/components/selected-items-detail-input/SelectedItemsDetailInputConfigPanel.tsx
index b08fbc64..0a05ed0c 100644
--- a/frontend/lib/registry/components/selected-items-detail-input/SelectedItemsDetailInputConfigPanel.tsx
+++ b/frontend/lib/registry/components/selected-items-detail-input/SelectedItemsDetailInputConfigPanel.tsx
@@ -73,6 +73,9 @@ export const SelectedItemsDetailInputConfigPanel: React.FC<SelectedItemsDetailIn
   // 🆕 부모 데이터 매핑: 각 매핑별 소스 테이블 컬럼 상태
   const [mappingSourceColumns, setMappingSourceColumns] = useState<Record<number, Array<{ columnName: string; columnLabel?: string; dataType?: string }>>>({});
 
+  // 🆕 추가 입력 필드별 자동 채우기 테이블 컬럼 상태
+  const [autoFillTableColumns, setAutoFillTableColumns] = useState<Record<number, Array<{ columnName: string; columnLabel?: string; dataType?: string }>>>({});
+
   // 🆕 원본/대상 테이블 컬럼 상태 (내부에서 로드)
   const [loadedSourceTableColumns, setLoadedSourceTableColumns] = useState<Array<{ columnName: string; columnLabel?: string; dataType?: string }>>([]);
   const [loadedTargetTableColumns, setLoadedTargetTableColumns] = useState<Array<{ columnName: string; columnLabel?: string; dataType?: string }>>([]);
@@ -137,6 +140,38 @@ export const SelectedItemsDetailInputConfigPanel: React.FC<SelectedItemsDetailIn
     loadColumns();
   }, [config.targetTable]);
 
+  // 🆕 자동 채우기 테이블 선택 시 컬럼 로드
+  const loadAutoFillTableColumns = async (tableName: string, fieldIndex: number) => {
+    if (!tableName) {
+      setAutoFillTableColumns(prev => ({ ...prev, [fieldIndex]: [] }));
+      return;
+    }
+
+    try {
+      console.log(`🔍 [필드 ${fieldIndex}] 자동 채우기 테이블 컬럼 로드:`, tableName);
+      
+      const { tableManagementApi } = await import("@/lib/api/tableManagement");
+      const response = await tableManagementApi.getColumnList(tableName);
+      
+      if (response.success && response.data) {
+        const columns = response.data.columns || [];
+        setAutoFillTableColumns(prev => ({
+          ...prev,
+          [fieldIndex]: columns.map((col: any) => ({
+            columnName: col.columnName,
+            columnLabel: col.displayName || col.columnLabel || col.columnName,
+            dataType: col.dataType,
+          }))
+        }));
+        console.log(`✅ [필드 ${fieldIndex}] 컬럼 로드 성공:`, columns.length);
+      } else {
+        console.error(`❌ [필드 ${fieldIndex}] 컬럼 로드 실패:`, response);
+      }
+    } catch (error) {
+      console.error(`❌ [필드 ${fieldIndex}] 컬럼 로드 오류:`, error);
+    }
+  };
+
   // 🆕 소스 테이블 선택 시 컬럼 로드
   const loadMappingSourceColumns = async (tableName: string, mappingIndex: number) => {
     try {
@@ -745,15 +780,66 @@ export const SelectedItemsDetailInputConfigPanel: React.FC<SelectedItemsDetailIn
               <div className="space-y-2">
                 <Label className="text-[10px] sm:text-xs">자동 채우기 (선택)</Label>
                 
-                {/* 테이블명 입력 */}
-                <Input
-                  value={field.autoFillFromTable || ""}
-                  onChange={(e) => updateField(index, { autoFillFromTable: e.target.value })}
-                  placeholder="비워두면 주 데이터 (예: item_price)"
-                  className="h-6 w-full text-[10px] sm:h-7 sm:text-xs"
-                />
+                {/* 테이블 선택 드롭다운 */}
+                <Popover>
+                  <PopoverTrigger asChild>
+                    <Button
+                      variant="outline"
+                      role="combobox"
+                      className="h-6 w-full justify-between text-[10px] sm:h-7 sm:text-xs"
+                    >
+                      {field.autoFillFromTable 
+                        ? allTables.find(t => t.tableName === field.autoFillFromTable)?.displayName || field.autoFillFromTable
+                        : "원본 테이블 (기본)"}
+                      <ChevronsUpDown className="ml-1 h-2 w-2 shrink-0 opacity-50 sm:h-3 sm:w-3" />
+                    </Button>
+                  </PopoverTrigger>
+                  <PopoverContent className="w-[250px] p-0 sm:w-[300px]">
+                    <Command>
+                      <CommandInput placeholder="테이블 검색..." className="h-6 text-[10px] sm:h-7 sm:text-xs" />
+                      <CommandEmpty className="text-[10px] sm:text-xs">테이블을 찾을 수 없습니다.</CommandEmpty>
+                      <CommandGroup className="max-h-[200px] overflow-auto">
+                        <CommandItem
+                          value=""
+                          onSelect={() => {
+                            updateField(index, { autoFillFromTable: undefined, autoFillFrom: undefined });
+                            setAutoFillTableColumns(prev => ({ ...prev, [index]: [] }));
+                          }}
+                          className="text-[10px] sm:text-xs"
+                        >
+                          <Check
+                            className={cn(
+                              "mr-1 h-2 w-2 sm:mr-2 sm:h-3 sm:w-3",
+                              !field.autoFillFromTable ? "opacity-100" : "opacity-0",
+                            )}
+                          />
+                          원본 테이블 ({config.sourceTable || "미설정"})
+                        </CommandItem>
+                        {allTables.map((table) => (
+                          <CommandItem
+                            key={table.tableName}
+                            value={table.tableName}
+                            onSelect={(value) => {
+                              updateField(index, { autoFillFromTable: value, autoFillFrom: undefined });
+                              loadAutoFillTableColumns(value, index);
+                            }}
+                            className="text-[10px] sm:text-xs"
+                          >
+                            <Check
+                              className={cn(
+                                "mr-1 h-2 w-2 sm:mr-2 sm:h-3 sm:w-3",
+                                field.autoFillFromTable === table.tableName ? "opacity-100" : "opacity-0",
+                              )}
+                            />
+                            {table.displayName || table.tableName}
+                          </CommandItem>
+                        ))}
+                      </CommandGroup>
+                    </Command>
+                  </PopoverContent>
+                </Popover>
                 <p className="text-[9px] text-gray-500 sm:text-[10px]">
-                  다른 테이블에서 가져올 경우 테이블명 입력
+                  다른 테이블에서 가져올 경우 테이블 선택
                 </p>
                 
                 {/* 필드 선택 */}
@@ -764,16 +850,26 @@ export const SelectedItemsDetailInputConfigPanel: React.FC<SelectedItemsDetailIn
                       role="combobox"
                       className="h-6 w-full justify-between text-[10px] sm:h-7 sm:text-xs"
                     >
-                      {field.autoFillFrom 
-                        ? sourceTableColumns.find(c => c.columnName === field.autoFillFrom)?.columnLabel || field.autoFillFrom
-                        : "필드 선택 안 함"}
+                      {(() => {
+                        if (!field.autoFillFrom) return "필드 선택 안 함";
+                        
+                        // 선택된 테이블의 컬럼에서 찾기
+                        const columns = field.autoFillFromTable 
+                          ? (autoFillTableColumns[index] || [])
+                          : (loadedSourceTableColumns.length > 0 ? loadedSourceTableColumns : sourceTableColumns);
+                        
+                        const found = columns.find(c => c.columnName === field.autoFillFrom);
+                        return found?.columnLabel || field.autoFillFrom;
+                      })()}
                       <ChevronsUpDown className="ml-1 h-2 w-2 shrink-0 opacity-50 sm:h-3 sm:w-3" />
                     </Button>
                   </PopoverTrigger>
                   <PopoverContent className="w-[180px] p-0 sm:w-[200px]">
                     <Command>
                       <CommandInput placeholder="컬럼 검색..." className="h-6 text-[10px] sm:h-7 sm:text-xs" />
-                      <CommandEmpty className="text-[10px] sm:text-xs">원본 테이블을 먼저 선택하세요.</CommandEmpty>
+                      <CommandEmpty className="text-[10px] sm:text-xs">
+                        {field.autoFillFromTable ? "컬럼을 찾을 수 없습니다" : "원본 테이블을 먼저 선택하세요"}
+                      </CommandEmpty>
                       <CommandGroup className="max-h-[150px] overflow-auto sm:max-h-[200px]">
                         <CommandItem
                           value=""
@@ -788,25 +884,32 @@ export const SelectedItemsDetailInputConfigPanel: React.FC<SelectedItemsDetailIn
                           />
                           선택 안 함
                         </CommandItem>
-                        {sourceTableColumns.map((column) => (
-                          <CommandItem
-                            key={column.columnName}
-                            value={column.columnName}
-                            onSelect={() => updateField(index, { autoFillFrom: column.columnName })}
-                            className="text-[10px] sm:text-xs"
-                          >
-                            <Check
-                              className={cn(
-                                "mr-1 h-2 w-2 sm:mr-2 sm:h-3 sm:w-3",
-                                field.autoFillFrom === column.columnName ? "opacity-100" : "opacity-0",
-                              )}
-                            />
-                            <div>
-                              <div className="font-medium">{column.columnLabel}</div>
-                              <div className="text-[9px] text-gray-500">{column.columnName}</div>
-                            </div>
-                          </CommandItem>
-                        ))}
+                        {(() => {
+                          // 선택된 테이블의 컬럼 또는 기본 원본 테이블 컬럼
+                          const columns = field.autoFillFromTable 
+                            ? (autoFillTableColumns[index] || [])
+                            : (loadedSourceTableColumns.length > 0 ? loadedSourceTableColumns : sourceTableColumns);
+                          
+                          return columns.map((column) => (
+                            <CommandItem
+                              key={column.columnName}
+                              value={column.columnName}
+                              onSelect={(value) => updateField(index, { autoFillFrom: value })}
+                              className="text-[10px] sm:text-xs"
+                            >
+                              <Check
+                                className={cn(
+                                  "mr-1 h-2 w-2 sm:mr-2 sm:h-3 sm:w-3",
+                                  field.autoFillFrom === column.columnName ? "opacity-100" : "opacity-0",
+                                )}
+                              />
+                              <div>
+                                <div className="font-medium">{column.columnLabel || column.columnName}</div>
+                                {column.dataType && <div className="text-[8px] text-gray-500">{column.dataType}</div>}
+                              </div>
+                            </CommandItem>
+                          ));
+                        })()}
                       </CommandGroup>
                     </Command>
                   </PopoverContent>