diff --git a/include/loader/default.h b/include/loader/default.h
new file mode 100644
index 0000000..d2ce92e
--- /dev/null
+++ b/include/loader/default.h
@@ -0,0 +1,6 @@
+#ifndef DEFAULT_H_
+#define DEFAULT_H_
+
+void load_default_config(const char *file);
+
+#endif
diff --git a/src/cleardns.c b/src/cleardns.c
index 1902bc9..4f43175 100644
--- a/src/cleardns.c
+++ b/src/cleardns.c
@@ -67,6 +67,8 @@ int main(int argc, char *argv[]) { // ClearDNS server
     LOG_LEVEL = LOG_DEBUG; // TODO: dev only
     log_info("ClearDNS server start (%s)", VERSION);
 
+    create_folder(WORK_DIR);
+
     load_config(config_file);
     free(config_file);
 
diff --git a/src/loader/CMakeLists.txt b/src/loader/CMakeLists.txt
index dd1ef74..90e826d 100644
--- a/src/loader/CMakeLists.txt
+++ b/src/loader/CMakeLists.txt
@@ -1,4 +1,4 @@
 cmake_minimum_required(VERSION 2.8.12)
 
-add_library(loader config.c loader.c parser.c)
+add_library(loader config.c default.c loader.c parser.c)
 target_link_libraries(loader applet)
diff --git a/src/loader/default.c b/src/loader/default.c
new file mode 100644
index 0000000..2815373
--- /dev/null
+++ b/src/loader/default.c
@@ -0,0 +1,63 @@
+#include <stdlib.h>
+#include "json.h"
+#include "logger.h"
+#include "system.h"
+#include "sundry.h"
+
+#define DEFAULT_CONFIG "\
+port: 53\n\
+\n\
+diverter:\n\
+  port: 5353\n\
+\n\
+adguard:\n\
+  enable: true\n\
+  port: 80\n\
+  username: admin\n\
+  password: cleardns\n\
+\n\
+cache:\n\
+  enable: true\n\
+  size: 4194304\n\
+  optimistic: true\n\
+\n\
+domestic:\n\
+  port: 4053\n\
+  bootstrap: 223.5.5.5\n\
+  primary:\n\
+    - tls://dns.alidns.com\n\
+    - https://doh.pub/dns-query\n\
+  fallback:\n\
+    - 223.6.6.6\n\
+    - 119.29.29.29\n\
+\n\
+foreign:\n\
+  port: 6053\n\
+  bootstrap: 8.8.8.8\n\
+  primary:\n\
+    - tls://dns.google\n\
+    - https://dns.cloudflare.com/dns-query\n\
+  fallback:\n\
+    - 1.1.1.1\n\
+    - 8.8.4.4\n\
+"
+
+void load_default_config(const char *config_file) {
+    if (is_file_exist(config_file)) {
+        log_debug("Configure file exist -> skip load default");
+        return;
+    }
+    log_info("Loading default configure file");
+    char *config_content = NULL;
+    if (is_json_suffix(config_file)) { // convert to json format
+        char temp_file[] = "temp.yml";
+        save_file(temp_file, DEFAULT_CONFIG);
+        config_content = to_json(temp_file);
+        remove_file(temp_file);
+    }
+    if (config_content == NULL) {
+        config_content = string_init(DEFAULT_CONFIG);
+    }
+    save_file(config_file, config_content);
+    free(config_content);
+}
diff --git a/src/loader/loader.c b/src/loader/loader.c
index d19aadb..49b45c5 100644
--- a/src/loader/loader.c
+++ b/src/loader/loader.c
@@ -7,6 +7,8 @@
 #include "dnsproxy.h"
 #include "constant.h"
 #include "structure.h"
+#include "default.h"
+#include "logger.h"
 
 struct cleardns loader;
 
@@ -105,13 +107,11 @@ adguard* load_filter(cleardns_config *config) {
 void load_config(const char *config_file) {
     cleardns_config *config = config_init();
 
-    // TODO: load default configure
+    load_default_config(config_file);
 
     config_parser(config, config_file);
     config_dump(config);
 
-    // TODO: mkdir -p ${WORK_DIR}
-
     if (!config->adguard.enable) {
         config->diverter.port = config->port; // override diverter port by dns port
     }
diff --git a/src/loader/parser.c b/src/loader/parser.c
index 7c8f2fe..e69a76c 100644
--- a/src/loader/parser.c
+++ b/src/loader/parser.c
@@ -155,19 +155,18 @@ void config_parser(cleardns_config *config, const char *config_file) {
 
     // TODO: load custom script
 
-    char *config_content = read_file(config_file);
+    char *config_content;
     if (is_json_suffix(config_file)) { // JSON format
         log_info("Start JSON configure parser");
-        cleardns_parser(config, config_content); // configure parser
+        config_content = read_file(config_file);
     } else { // YAML or TOML format
         log_info("Start configure parser");
-        char *json_content = to_json(config_content); // convert to json format
-        if (json_content == NULL) {
+        config_content = to_json(config_file); // convert to json format
+        if (config_content == NULL) {
             log_fatal("Configure parser error");
         }
-        cleardns_parser(config, json_content); // configure parser
-        free(json_content);
     }
+    cleardns_parser(config, config_content); // configure parser
     free(config_content);
     log_info("Configure parser success");
 }