diff --git a/docs/about/dev.rst b/docs/about/dev.rst
index 8586d10..309d1dc 100644
--- a/docs/about/dev.rst
+++ b/docs/about/dev.rst
@@ -1,8 +1,7 @@
 .. _dev:
-
-=============
-Code Standard
-=============
+================
+For Developer
+================
 
 Docstring
 ============
diff --git a/learnware/market/base.py b/learnware/market/base.py
index ea966f4..0779126 100644
--- a/learnware/market/base.py
+++ b/learnware/market/base.py
@@ -3,12 +3,12 @@ from __future__ import annotations
 import traceback
 import zipfile
 import tempfile
-from typing import Tuple, Any, List, Union, Dict
+from typing import Tuple, Any, List, Union, Dict, Optional
 from dataclasses import dataclass
 from ..learnware import Learnware, get_learnware_from_dirpath
 from ..logger import get_module_logger
 
-logger = get_module_logger("market_base", "INFO")
+logger = get_module_logger("market_base")
 
 
 class BaseUserInfo:
@@ -55,18 +55,25 @@ class BaseUserInfo:
         """
         self.stat_info[name] = item
 
+
 @dataclass
 class SearchItem:
     score: float
-    learnware_list: List[Learnware]
+    learnwares: Union[Learnware, List[Learnware]]
 
 class SearchResults:
-    def __init__(self):
-        self.search_results: Dict[str, List[SearchItem]] = {}
+    def __init__(self, single_results: Optional[List[SearchItem]] = None, multiple_results: Optional[List[SearchItem]] = None):
+        self.single_results: List[SearchItem] = [] if single_results is None else single_results
+        self.multiple_results: List[SearchItem] = [] if multiple_results is None else multiple_results
+
+    def get_single_results(self):
+        return self.single_results
 
-    def get_types(self):
-        return list(self.search_results.keys())
+    def get_multiple_results(self):
+        return self.multiple_results
     
+    def update_single_results(self, score_list: List[float], learnware_list:List[Learnware]):
+         
     def update(self, type, score_list: List[float], learnware_lists: List[List[Learnware]]):
         search_terms = [SearchItem(score, learnware_list) for score, learnware_list in zip(score_list, learnware_lists)]
         search_terms = sorted(search_terms, key=lambda x:x.score)
diff --git a/learnware/market/easy/searcher.py b/learnware/market/easy/searcher.py
index 5820ee9..1ae5e15 100644
--- a/learnware/market/easy/searcher.py
+++ b/learnware/market/easy/searcher.py
@@ -6,7 +6,7 @@ from typing import Tuple, List, Union
 
 from .organizer import EasyOrganizer
 from ..utils import parse_specification_type
-from ..base import BaseUserInfo, BaseSearcher
+from ..base import BaseUserInfo, BaseSearcher, SearchResults
 from ...learnware import Learnware
 from ...specification import RKMETableSpecification, RKMEImageSpecification, RKMETextSpecification, rkme_solve_qp
 from ...logger import get_module_logger