diff --git a/src/entry/Maat_api.cpp b/src/entry/Maat_api.cpp
index 798edea..c940a7b 100644
--- a/src/entry/Maat_api.cpp
+++ b/src/entry/Maat_api.cpp
@@ -1419,10 +1419,11 @@ int Maat_full_scan_string_detail(Maat_feather_t feather,int table_id
 	scan_data.text_data.toffset=0;
 
 	struct Maat_table_runtime* table_rt=Maat_table_runtime_get(my_scanner->table_rt_mgr, p_table->table_id);
-	if(table_rt->origin_rule_num==0)
-	{
-		return 0;
-	}
+//	Even no rule in table, we still need to search for NOT compile.
+//	if(table_rt->origin_rule_num==0)
+//	{
+//		return 0;
+//	}
 	assert(thread_num<_feather->scan_thread_num);
 	region_result=my_scanner->region_rslt_buff+MAX_SCANNER_HIT_NUM*thread_num;
 	
@@ -1543,10 +1544,12 @@ int Maat_scan_intval(Maat_feather_t feather,int table_id
 		return 0;
 	}
 	struct Maat_table_runtime* table_rt=Maat_table_runtime_get(my_scanner->table_rt_mgr, p_table->table_id);
-	if(table_rt->origin_rule_num==0)
-	{
-		return 0;
-	}
+
+//	Even no rule in table, we still need to search for NOT compile.
+//	if(table_rt->origin_rule_num==0)
+//	{
+//		return 0;
+//	}
 	if(p_table->table_type==TABLE_TYPE_INTERVAL_PLUS&&(_mid==NULL||_mid->is_set_district!=1))
 	{
 		_feather->scan_err_cnt++;
@@ -1651,10 +1654,6 @@ int Maat_similar_scan_string(Maat_feather_t feather,int table_id
 	GIE_result_t* region_result=my_scanner->gie_rslt_buff+MAX_SCANNER_HIT_NUM*thread_num;
 
 	struct Maat_table_runtime* table_rt=Maat_table_runtime_get(my_scanner->table_rt_mgr, p_table->table_id);
-	if(table_rt->origin_rule_num==0)
-	{
-		return 0;
-	}	
 
 	GIE_handle_t* gie_handle=table_rt->similar.gie_handle;	
 	INC_SCANNER_REF(my_scanner,thread_num);
@@ -2038,7 +2037,7 @@ int Maat_stream_scan_string_detail(stream_para_t* stream_para
 	{
 		return 0;
 	}
-	//table rule num is already  in Maat_stream_scan_string_start
+	//table rule num is already tested in Maat_stream_scan_string_start
 
 
 	if(sp->p_real_table->table_type==TABLE_TYPE_EXPR_PLUS&&(_mid==NULL||_mid->is_set_district!=1))
diff --git a/test/maat_json.json b/test/maat_json.json
index c6b24c3..036947a 100644
--- a/test/maat_json.json
+++ b/test/maat_json.json
@@ -2156,21 +2156,6 @@
                         }                  
                     ],
                     "not_flag" : 0
-                },
-                {
-                    "regions": [
-                        {
-                            "table_name": "KEYWORDS_TABLE",
-                            "table_type": "string",
-                            "table_content": {
-                                "keywords": "contains-keywords-MUST-hit-by-rule-186",
-                                "expr_type": "and",
-                                "match_method": "expr",
-                                "format": "uncase plain"
-                            }
-                        }
-                    ],
-                     "not_flag" : 0
                 }
             ]
         }
diff --git a/test/table_info.conf b/test/table_info.conf
index 33092b1..b24b08f 100644
--- a/test/table_info.conf
+++ b/test/table_info.conf
@@ -58,4 +58,5 @@
 35	INTERGER_PLUS	intval_plus --
 36	TEST_FQDN_PLUGIN_WITH_EXDATA	fqdn_plugin	{"row_id":1,"is_suffix_match":2,"fqdn":3,"valid":5}	--
 37	VIRTUAL_SSL_SNI	virtual	["KEYWORDS_TABLE","INTERGER_PLUS"]	--
-38	APP_ID	intval	--
\ No newline at end of file
+38	APP_ID	intval	--
+39	EMPTY_KEYWORD	expr	UTF8	UTF8	yes	0
\ No newline at end of file
diff --git a/test/test_maatframe.cpp b/test/test_maatframe.cpp
index d1173eb..fda68aa 100644
--- a/test/test_maatframe.cpp
+++ b/test/test_maatframe.cpp
@@ -1117,12 +1117,12 @@ TEST(NOTLogic, ScanIrrelavantAtLast)
 TEST(NOTLogic, ScanHitAtLast)
 {
 	const char* string_should_not_hit="This string should not hit.";
-	const char* string_should_hit="This string contains-keywords-MUST-hit-by-rule-186.";
+	const char* string_match_no_region="This string is matched against a empty table.";
 	int ret=0;
 	int table_id=0;
 	struct Maat_rule_t result[4];
 	int found_pos[4];
-	const char* not_hit_table_name="HTTP_URL", *hit_table_name1="IP_PLUS_CONFIG", *hit_table_name2="KEYWORDS_TABLE";
+	const char* not_hit_table_name="HTTP_URL", *hit_table_name1="IP_PLUS_CONFIG", *empty_table_name="EMPTY_KEYWORD";
 	scan_status_t mid=NULL;
 	table_id=Maat_table_register(g_feather, not_hit_table_name);
 	ASSERT_GT(table_id, 0);
@@ -1148,14 +1148,14 @@ TEST(NOTLogic, ScanHitAtLast)
 	
 	EXPECT_EQ(ret, -2);
 
-	table_id=Maat_table_register(g_feather, hit_table_name2);
+	table_id=Maat_table_register(g_feather, empty_table_name);
 	ASSERT_GT(table_id, 0);
 
 	Maat_set_scan_status(g_feather, &mid, MAAT_SET_SCAN_LAST_REGION, NULL, 0);	
 
-	ret=Maat_full_scan_string(g_feather, table_id, CHARSET_GBK, string_should_hit, strlen(string_should_hit), 
+	ret=Maat_full_scan_string(g_feather, table_id, CHARSET_GBK, string_match_no_region, strlen(string_match_no_region), 
 						result, found_pos, 4, &mid, 0);						
-	
+	EXPECT_EQ(ret, 1);
 	EXPECT_EQ(result[0].config_id, 186);
 	Maat_clean_status(&mid);