diff --git a/CMakeLists.txt b/CMakeLists.txt
index 39864fd..e4430af 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15)
+cmake_minimum_required(VERSION 3.13)
 project(Net)
 
 set(CMAKE_CXX_STANDARD 14)
@@ -7,29 +7,10 @@ include_directories(include/)
 include_directories(utils/)
 
 find_package(Boost   REQUIRED)
-find_package(OpenSSL REQUIRED)
-
-message(STATUS SSL ${OPENSSL_LIBRARIES})
-
-include(GoogleTest)
-
-set(OPENSSL_LIBS /usr/local/lib/libssl.dylib /usr/local/lib/libcrypto.dylib)
-set(GTEST_LIB /usr/local/lib/)
-set(GTEST_LIBS gtest pthread dl)
+find_package(OpenSSL 1.1.1 REQUIRED)
 
 include_directories(${Boost_INCLUDE_DIRS} ${OPENSSL_INCLUDE_DIR} ${SQLiteCpp_INCLUDE_DIRS})
-link_directories(${GTEST_LIB})
 
-aux_source_directory(src SOURCE_ALL)
+add_subdirectory(src)
 
-add_executable(NetTest test/test_main.cpp)
-
-gtest_add_tests(TARGET         NetTest
-                TEST_SUFFIX    .noArgs
-                TEST_LIST      noArgsTests)
-
-add_library(m_error STATIC src/error.cpp)
-add_library(m_rsa STATIC src/rsa_cpp_binding.cpp)
-
-target_link_libraries(NetTest m_rsa  m_error ${GTEST_LIBS} ssl crypto boost_program_options)
-set_tests_properties(${noArgsTests}   PROPERTIES TIMEOUT 10)
\ No newline at end of file
+add_subdirectory(test)
\ No newline at end of file
diff --git a/include/cmap.h b/include/cmap.h
index 9307956..53a8bee 100644
--- a/include/cmap.h
+++ b/include/cmap.h
@@ -11,7 +11,7 @@
 
 #include "type.h"
 #include "cpart.h"
-#include "sha256_cpp_binding.h"
+#include "util/sha256_generator.h"
 #include "sql.h"
 
 //计算模块管理对象间的依赖关系管理结构
diff --git a/include/cproj.h b/include/cproj.h
index 949b1cc..fce1c8a 100644
--- a/include/cproj.h
+++ b/include/cproj.h
@@ -11,7 +11,7 @@
 
 #include "type.h"
 #include "cpart.h"
-#include "sha256_cpp_binding.h"
+#include "util/sha256_generator.h"
 #include "sql.h"
 
 class Proj;
diff --git a/include/error.h b/include/debug_tools/print_tools.h
similarity index 70%
rename from include/error.h
rename to include/debug_tools/print_tools.h
index d20088d..548764e 100644
--- a/include/error.h
+++ b/include/debug_tools/print_tools.h
@@ -2,8 +2,8 @@
 // Created by Eric Saturn on 2019/12/12.
 //
 
-#ifndef NET_ERROR_H
-#define NET_ERROR_H
+#ifndef NET_PRINT_TOOLS_H
+#define NET_PRINT_TOOLS_H
 
 #include <string>
 #include <map>
@@ -14,7 +14,8 @@ using std::pair;
 
 //提示信息打印类函数
 namespace Net {
-    namespace error {
+
+    namespace printTools {
 
         using FormalItem = pair<string, string>;
 
@@ -22,17 +23,17 @@ namespace Net {
 
         void printWarning(string warning_info);
 
-        void printSuccess(string succes_info);
+        void printSuccess(string success_info);
 
         void printRed(string red_info);
 
         void printInfo(const string& info, string tag = "");
 
-        void printInfoBuffer(const string& info, string tag = "");
+        void printInfoBuffer(const string& info, const string& tag = "");
 
         void printInfoFormal(const string& title, initializer_list<FormalItem> body);
     }
 }
 
 
-#endif //NET_ERROR_H
+#endif //NET_PRINT_TOOLS_H
diff --git a/include/rsa_cpp_binding.h b/include/utils/rsa_key_chain.h
similarity index 88%
rename from include/rsa_cpp_binding.h
rename to include/utils/rsa_key_chain.h
index 97a179f..07861ab 100644
--- a/include/rsa_cpp_binding.h
+++ b/include/utils/rsa_key_chain.h
@@ -2,11 +2,11 @@
 // Created by Eric Saturn on 2019/12/10.
 //
 
-#ifndef NET_RSA_CPP_BINDING_H
-#define NET_RSA_CPP_BINDING_H
+#ifndef NET_RSA_KEY_CHAIN_H
+#define NET_RSA_KEY_CHAIN_H
 
-#include "error.h"
-#include "../src/bignumber.cpp"
+#include "debug_tools/print_tools.h"
+#include "../../src/bignumber.cpp"
 
 #include <openssl/rsa.h>
 #include <openssl/pem.h>
@@ -18,6 +18,10 @@
 using namespace std;
 
 namespace Net {
+
+    /**
+     * The Public Key For A RSA Key Chain
+     */
     class RSAPubKey{
     public:
         explicit RSAPubKey(const RSA *rsa){
@@ -29,7 +33,7 @@ namespace Net {
         }
 
         void printInfo(){
-            error::printInfoFormal("RSAPubKey Info", {
+            printTools::printInfoFormal("RSAPubKey Info", {
                     {"n", this->n.getDataHex()},
                     {"e", this->e.getDataHex()}
             });
@@ -39,6 +43,9 @@ namespace Net {
         BigNumber e;
     };
 
+    /**
+     * The Private Key For A RSA Key Chain
+     */
     class RSAPrvKey{
     public:
         explicit RSAPrvKey(const RSA *rsa) {
@@ -54,8 +61,8 @@ namespace Net {
             this->q.copyFrom(q);
         }
 
-        void printInfo(){
-            error::printInfoFormal("RSAPrvKey Info", {
+        void printInfo() const{
+            printTools::printInfoFormal("RSAPrvKey Info", {
                 {"n", this->n.getDataHex()},
                 {"e", this->e.getDataHex()},
                 {"d", this->d.getDataHex()},
@@ -134,4 +141,4 @@ namespace Net {
 }
 
 
-#endif //NET_RSA_CPP_BINDING_H
+#endif //NET_RSA_KEY_CHAIN_H
diff --git a/include/sha256_cpp_binding.h b/include/utils/sha256_generator.h
similarity index 89%
rename from include/sha256_cpp_binding.h
rename to include/utils/sha256_generator.h
index e3bb3ff..fc58c87 100644
--- a/include/sha256_cpp_binding.h
+++ b/include/utils/sha256_generator.h
@@ -9,6 +9,10 @@ using std::string;
 using std::ifstream;
 using std::stringstream;
 
+/**
+ * The Generator of SHA256 Hex
+ * We can use it in an easy way.
+ */
 class SHA256Generator{
 public:
     SHA256Generator(string data){
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
new file mode 100644
index 0000000..4f991e6
--- /dev/null
+++ b/src/CMakeLists.txt
@@ -0,0 +1,2 @@
+add_subdirectory(utils)
+add_subdirectory(debug_tools)
\ No newline at end of file
diff --git a/src/debug_tools/CMakeLists.txt b/src/debug_tools/CMakeLists.txt
new file mode 100644
index 0000000..7c1e1a5
--- /dev/null
+++ b/src/debug_tools/CMakeLists.txt
@@ -0,0 +1 @@
+add_library(debugTools STATIC print_tools.cpp)
\ No newline at end of file
diff --git a/src/error.cpp b/src/debug_tools/print_tools.cpp
similarity index 66%
rename from src/error.cpp
rename to src/debug_tools/print_tools.cpp
index d6ba7f1..072ab80 100644
--- a/src/error.cpp
+++ b/src/debug_tools/print_tools.cpp
@@ -2,29 +2,29 @@
 // Created by Eric Saturn on 2019/12/12.
 //
 
-#include "error.h"
+#include "debug_tools/print_tools.h"
 
 using std::string;
 
 namespace Net {
-    namespace error {
-        void printError(string error_info) {
+    namespace printTools {
+        void printError(const string &error_info) {
             printf("\033[31mError: %s\033[0m\n", error_info.data());
         }
 
-        void printWarning(string warning_info) {
+        void printWarning(const string &warning_info) {
             printf("\033[33mWarning: %s\033[0m\n", warning_info.data());
         }
 
-        void printSuccess(string succes_info) {
-            printf("\033[32m%s\033[0m\n", succes_info.data());
+        void printSuccess(const string &success_info) {
+            printf("\033[32m%s\033[0m\n", success_info.data());
         }
 
-        void printRed(string red_info) {
+        void printRed(const string &red_info) {
             printf("\033[31m%s\n\033[0m", red_info.data());
         }
 
-        void printInfo(const string& info, string tag) {
+        void printInfo(const string& info, string &tag) {
             printf("[DEBUG INFO] %s ", info.data());
             if(tag.size())
                 printf("{ %s }\n",tag.data());
@@ -33,17 +33,17 @@ namespace Net {
         void printInfoFormal(const string& title, initializer_list<FormalItem> body) {
             printf("\n>>>\n {%s}\n",title.data());
             printf(">-------------------------------------\n");
-            for(auto item : body){
+            for(auto &item : body){
                 printf("[%s] : \"%s\"; \n", item.first.data(), item.second.data());
             }
             printf("----------------------------------<\n<<<\n\n");
         }
 
-        void printInfoBuffer(const string &info, string tag) {
+        void printInfoBuffer(const string &info, const string& tag) {
             printf("\n[DEBUG INFO (BUFFER)]\n");
             printf(">----------------------------------------------\n");
-            uint8_t *p_i = (uint8_t *) &info[0];
-            uint8_t *p_e = (uint8_t *) &info[info.size()-1];
+            auto *p_i = (uint8_t *) &info[0];
+            auto *p_e = (uint8_t *) &info[info.size()-1];
             for(int c = 0;p_i < p_e; ++p_i, ++c){
                 if(!(c % 16) && c) printf("\n");
                 printf("%02x ",*p_i);
@@ -51,7 +51,7 @@ namespace Net {
             }
             printf("\n");
             printf("----------------------------------------------<\n");
-            if(tag.size())
+            if(!tag.empty())
                 printf("{ %s }\n\n",tag.data());
         }
     }
diff --git a/src/utils/CMakeLists.txt b/src/utils/CMakeLists.txt
new file mode 100644
index 0000000..c2e71bb
--- /dev/null
+++ b/src/utils/CMakeLists.txt
@@ -0,0 +1 @@
+add_library(utils STATIC rsa_key_chain.cpp)
\ No newline at end of file
diff --git a/src/rsa_cpp_binding.cpp b/src/utils/rsa_key_chain.cpp
similarity index 93%
rename from src/rsa_cpp_binding.cpp
rename to src/utils/rsa_key_chain.cpp
index 6a9b774..9880f19 100644
--- a/src/rsa_cpp_binding.cpp
+++ b/src/utils/rsa_key_chain.cpp
@@ -2,7 +2,10 @@
 // Created by Eric Saturn on 2019/12/10.
 //
 
-#include "rsa_cpp_binding.h"
+#include <stdexcept>
+#include "utils/rsa_key_chain.h"
+
+using std::runtime_error;
 
 void Net::RSAKeyChain::generateKeyPair() {
     BigNumber e;
@@ -56,6 +59,6 @@ bool Net::RSAKeyChain::checkKey() {
     if(!this->if_prv_key) throw runtime_error("illegal call of checkKey");
     if(this->key_pair == nullptr) throw runtime_error("key pair is invalid");
     int return_code = RSA_check_key(this->key_pair);
-    if(return_code == -1) throw runtime_error("error occur when rsa check key");
+    if(return_code == -1) throw runtime_error("printTools occur when rsa check key");
     else return return_code == 1;
 }
diff --git a/src/sha256_cpp_binding.cpp b/src/utils/sha256_generator.cpp
similarity index 86%
rename from src/sha256_cpp_binding.cpp
rename to src/utils/sha256_generator.cpp
index bfc5301..cd75f18 100644
--- a/src/sha256_cpp_binding.cpp
+++ b/src/utils/sha256_generator.cpp
@@ -1,6 +1,9 @@
 #include "type.h"
-#include "sha256_cpp_binding.h"
+#include "util/sha256_generator.h"
 
+/**
+ * Generate SHA256 Hex Code
+ */
 void SHA256Generator::generate() {
     unsigned char hash[SHA256_DIGEST_LENGTH];
     SHA256_CTX sha256;
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
new file mode 100644
index 0000000..65da75a
--- /dev/null
+++ b/test/CMakeLists.txt
@@ -0,0 +1,8 @@
+find_package(GTest REQUIRED)
+
+set(GTEST_LIB /usr/local/lib/)
+set(GTEST_LIBS gtest gmock pthread dl)
+
+link_directories(${GTEST_LIB})
+
+add_subdirectory(test_util)
diff --git a/test/env.h b/test/env.h
index fd39229..d2f2d1c 100644
--- a/test/env.h
+++ b/test/env.h
@@ -5,7 +5,7 @@
 #ifndef NET_ENV_H
 #define NET_ENV_H
 
-#include "rsa_cpp_binding.h"
+#include "utils/rsa_key_chain.h"
 
 class GlobalTestEnv : public testing::Environment{
 public:
diff --git a/test/rsa_test.cpp b/test/rsa_test.cpp
deleted file mode 100644
index 1ae60bd..0000000
--- a/test/rsa_test.cpp
+++ /dev/null
@@ -1,52 +0,0 @@
-//
-// Created by Eric Saturn on 2019/12/12.
-//
-
-#include <gtest/gtest.h>
-#include <rsa_cpp_binding.h>
-
-#include "env.h"
-
-using namespace Net;
-using namespace std;
-
-extern GlobalTestEnv *_env;
-
-TEST(RSATest, init_test_1) {
-
-}
-
-TEST(RSATest, generate_test_1) {
-   _env->rsa->generateKeyPair();
-    error::printInfo(to_string(_env->rsa->getBufferSize()), string("Buffer Size"));
-}
-
-TEST(RSATest, pub_encrypt_test_1) {
-    string encrypted_data;
-    _env->rsa->publicKeyEncrypt(_env->rsa_test_data, encrypted_data);
-    error::printInfoBuffer(encrypted_data, "Encrypted Data");
-    _env->rsa_encrypt_data = encrypted_data;
-}
-
-TEST(RSATest, prv_decrypt_test_1){
-    string data;
-    _env->rsa->privateKeyDecrypt(data, _env->rsa_encrypt_data);
-    error::printInfo(data, "Decrypt Data");
-    ASSERT_EQ(data, _env->rsa_test_data);
-}
-
-TEST(RSATest, pub_key_get_test_1){
-    _env->pubKey = shared_ptr<RSAPubKey>(new RSAPubKey(_env->rsa->getRSA()));
-
-}
-
-TEST(RSATest, prv_key_get_test_1){
-    _env->prvKey = shared_ptr<RSAPrvKey>(new RSAPrvKey(_env->rsa->getRSA()));
-    ASSERT_EQ(_env->rsa->checkKey(), true);
-    _env->prvKey->printInfo();
-}
-
-TEST(RSATest, prv_key_build_key_chain){
-    RSAKeyChain keyChain(*_env->prvKey);
-    ASSERT_EQ(keyChain.checkKey(), true);
-}
\ No newline at end of file
diff --git a/test/test_util/CMakeLists.txt b/test/test_util/CMakeLists.txt
new file mode 100644
index 0000000..6925f9a
--- /dev/null
+++ b/test/test_util/CMakeLists.txt
@@ -0,0 +1,9 @@
+
+add_executable(testUtils main.cpp)
+
+message(${GTEST_LIBS})
+
+link_libraries(testUtils utils debugTools ${GTEST_LIBS})
+
+add_test(Name testUtils
+         COMMAND testUtils)
\ No newline at end of file
diff --git a/test/test_main.cpp b/test/test_util/main.cpp
similarity index 53%
rename from test/test_main.cpp
rename to test/test_util/main.cpp
index 39098e8..d9a0cf1 100644
--- a/test/test_main.cpp
+++ b/test/test_util/main.cpp
@@ -4,14 +4,12 @@
 
 #include <gtest/gtest.h>
 
-#include "rsa_test.cpp"
+#include "../env.h"
 
-#include "env.h"
-
-GlobalTestEnv *_env;
+GlobalTestEnv *env;
 
 int main(int argc, char *argv[]){
     ::testing::InitGoogleTest(&argc, argv);
-    _env = dynamic_cast<GlobalTestEnv *>(::testing::AddGlobalTestEnvironment(new GlobalTestEnv));
+    env = dynamic_cast<GlobalTestEnv *>(::testing::AddGlobalTestEnvironment(new GlobalTestEnv));
     return RUN_ALL_TESTS();
 }
diff --git a/test/test_util/test_rsa.cpp b/test/test_util/test_rsa.cpp
new file mode 100644
index 0000000..79dc25c
--- /dev/null
+++ b/test/test_util/test_rsa.cpp
@@ -0,0 +1,55 @@
+//
+// Created by Eric Saturn on 2019/12/12.
+//
+
+#include <gtest/gtest.h>
+
+#include <memory>
+
+#include "../env.h"
+
+#include "utils/rsa_key_chain.h"
+
+using namespace Net;
+using namespace std;
+
+extern GlobalTestEnv *env;
+
+TEST(RSATest, init_test_1) {
+
+}
+
+TEST(RSATest, generate_test_1) {
+   env->rsa->generateKeyPair();
+   printTools::printInfo(to_string(env->rsa->getBufferSize()), string("Buffer Size"));
+}
+
+TEST(RSATest, pub_encrypt_test_1) {
+    string encrypted_data;
+    env->rsa->publicKeyEncrypt(env->rsa_test_data, encrypted_data);
+    printTools::printInfoBuffer(encrypted_data, "Encrypted Data");
+    env->rsa_encrypt_data = encrypted_data;
+}
+
+TEST(RSATest, prv_decrypt_test_1){
+    string data;
+    env->rsa->privateKeyDecrypt(data, env->rsa_encrypt_data);
+    printTools::printInfo(data, "Decrypt Data");
+    ASSERT_EQ(data, env->rsa_test_data);
+}
+
+TEST(RSATest, pub_key_get_test_1){
+    env->pubKey = std::make_shared<RSAPubKey>(env->rsa->getRSA());
+
+}
+
+TEST(RSATest, prv_key_get_test_1){
+    env->prvKey = std::make_shared<RSAPrvKey>(env->rsa->getRSA());
+    ASSERT_EQ(env->rsa->checkKey(), true);
+    env->prvKey->printInfo();
+}
+
+TEST(RSATest, prv_key_build_key_chain){
+    RSAKeyChain keyChain(*env->prvKey);
+    ASSERT_EQ(keyChain.checkKey(), true);
+}
\ No newline at end of file