diff --git a/CMakeLists.txt b/CMakeLists.txt
index c0adf0f..60cd6d6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,12 +26,10 @@ if(simhash_BUILD_TESTS)
 	    set(CMAKE_CXX_STANDARD 11)
 	endif()
 
-	ADD_SUBDIRECTORY(example)
 	ADD_SUBDIRECTORY(test)
 	ADD_SUBDIRECTORY(benchmark)
 
 	ENABLE_TESTING()
 	ADD_TEST(NAME ./test/test.run COMMAND ./test/test.run)
 	ADD_TEST(NAME ./test/load_test COMMAND ./test/load_test)
-	ADD_TEST(NAME ./demo COMMAND ./demo)
 endif()
diff --git a/example/CMakeLists.txt b/example/CMakeLists.txt
deleted file mode 100644
index 173e2d1..0000000
--- a/example/CMakeLists.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-SET(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR})
-
-ADD_EXECUTABLE(demo demo.cpp)
diff --git a/example/demo.cpp b/example/demo.cpp
deleted file mode 100644
index 82317bb..0000000
--- a/example/demo.cpp
+++ /dev/null
@@ -1,34 +0,0 @@
-#include <iostream>
-#include <fstream>
-
-//this define can avoid some logs which you don't need to care about.
-#define LOGGER_LEVEL LL_WARN 
-
-#include "simhash/Simhasher.hpp"
-using namespace simhash;
-
-int main(int argc, char** argv)
-{
-    Simhasher simhasher("../submodules/cppjieba/dict/jieba.dict.utf8", "../submodules/cppjieba/dict/hmm_model.utf8", "../submodules/cppjieba/dict/idf.utf8", "../submodules/cppjieba/dict/stop_words.utf8");
-    string s("我是蓝翔技工拖拉机学院手扶拖拉机专业的。不用多久，我就会升职加薪，当上总经理，出任CEO，走上人生巅峰。");
-    size_t topN = 5;
-    uint64_t u64 = 0;
-    vector<pair<string ,double> > res;
-    simhasher.extract(s, res, topN);
-    simhasher.make(s, topN, u64);
-    cout<< "文本：\"" << s << "\"" << endl;
-    cout << "关键词序列是: " << res << endl;
-    cout<< "simhash值是: " << u64<<endl;
-
-
-    const char * bin1 = "100010110110";
-    const char * bin2 = "110001110011";
-    uint64_t u1, u2;
-    u1 = Simhasher::binaryStringToUint64(bin1); 
-    u2 = Simhasher::binaryStringToUint64(bin2); 
-    
-    cout<< bin1 << "和" << bin2 << " simhash值的相等判断如下："<<endl;
-    cout<< "海明距离阈值默认设置为3，则isEqual结果为：" << (Simhasher::isEqual(u1, u2)) << endl; 
-    cout<< "海明距离阈值默认设置为5，则isEqual结果为：" << (Simhasher::isEqual(u1, u2, 5)) << endl; 
-    return EXIT_SUCCESS;
-}