diff --git a/CMakeLists.txt b/CMakeLists.txt
index f506b20..4b92779 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -19,9 +19,7 @@ file(GLOB TEST_SOURCES ${CMAKE_SOURCE_DIR}/unit/*.cpp)
 
 foreach(TEST_SOURCE ${TEST_SOURCES})
     get_filename_component(TEST_NAME ${TEST_SOURCE} NAME_WE)
-    add_executable(${TEST_NAME} ${TEST_SOURCE} ${SOURCES}
-            include/scanner.h
-            include/Tbs.h)
+    add_executable(${TEST_NAME} ${TEST_SOURCE} ${SOURCES})
     add_test(NAME ${TEST_NAME} COMMAND ${TEST_NAME})
 endforeach(TEST_SOURCE ${TEST_SOURCES})
 
diff --git a/include/Scanner.h b/include/Scanner.h
index bbf2153..6170c97 100644
--- a/include/Scanner.h
+++ b/include/Scanner.h
@@ -22,11 +22,13 @@ public:
                 i += len - 1; 
                 len = 0;
             } else if (len = process_key_table(i)) {
-                i += len - 1; 
+                i += len - 1;
                 len = 0;
             } else if (len = process_punct_table(i)) {
                 i += len - 1; 
                 len = 0;
+            } else if (m_source_code[i] == ' ' || m_source_code[i] == '\t' || m_source_code[i] == '\n') {
+                continue;
             } else {
                 std::cerr << "Error: Tokenize" << std::endl;
                 exit(0);
@@ -50,4 +52,7 @@ private:
     std::vector<Token> m_token_list;
     Tbs m_tables;
     int index;
+
+    // 记录标识符表的索引
+    int identifier_index = 0;
 };
\ No newline at end of file
diff --git a/src/Scanner.cpp b/src/Scanner.cpp
index cf8b5d7..7387059 100644
--- a/src/Scanner.cpp
+++ b/src/Scanner.cpp
@@ -1,15 +1,40 @@
 #include "Scanner.h"
-using std::cout;
+#include <sstream>
 
 int Scanner::process_const_table(int index) {
+    return 0;
 }
 
 int Scanner::process_identifier_table(int index) {
+    std::stringstream buffer;
+    int old_index = index;
+    if (std::isalpha(m_source_code[index])) {
+        buffer << m_source_code[index];
+        index += 1;
+        while(std::isalnum(m_source_code[index])) {
+            buffer << m_source_code[index];
+            index += 1;
+        }
+
+        std::string identifier = buffer.str();
+        for (const auto& key : m_tables.KeyTable) {
+            if (identifier == key.second) {
+                return 0;
+            }
+        }
+
+        m_tables.IdTable.insert({identifier_index, identifier});
+        m_token_list.push_back(Token{identifier_index, ID_TABLE});
+        identifier_index++;
+        return index - old_index;
+    } else {
+        return 0;
+    }
 
 }
 
 int Scanner::process_key_table(int index) {
-    
+    return 0;
 }
 
 int Scanner::process_punct_table(int index) {
diff --git a/unit/scanner_test.cpp b/unit/scanner_test.cpp
index e9918d8..1246e77 100644
--- a/unit/scanner_test.cpp
+++ b/unit/scanner_test.cpp
@@ -6,6 +6,17 @@
 #include <vector>
 using std::string,std::vector;
 
+TEST_CASE("Scanner test identifier table") {
+    Tbs tables;
+    std::string src = "abcvljl laadfs fafarwrw";
+    Scanner scan(src, tables);
+    scan.scan();
+
+    for (auto value_src: scan.get_token_list()) {
+        std::cout << value_src.id << " " << value_src.type << "\n";
+    }
+}
+
 
 TEST_CASE("Scanner test Punct table") {
     Tbs tables = {};