diff --git a/README.md b/README.md
index bb95630..5c22318 100644
--- a/README.md
+++ b/README.md
@@ -11,11 +11,12 @@ Usage:
 ```
 
 Server OPTION and arguments:
-- `-p port`   :set to port binding. couldn't set to 0
-- `-h`        :print help message.
+- `-p port` :set to port binding. couldn't set to 0
+- `-h` or `--help` :print help message.
 
 Client option and arguments:
-- `-b`        :benchmark mode
+- `-b` or `--benchmark` :benchmark mode
+- `--nogui` :no progress bar
 
 Available macro:
 
@@ -28,6 +29,7 @@ For server
 - DEFAULT_WORK_QUEUE_SIZE(server only): 10
 - DEFAULT_MAX_THREAD_NUMBER(server only): 10
 - DEFAULT_RESPONSE_REQUEST(p-server only): 3(-1 is INF)
+
 For client
 - MUL_CLIENT(second unit)
 - SLOW_CLIENT(microsecond unit, (buf_size/SLOW_CLIENT) bytes/usec)
diff --git a/client.c b/client.c
index d19e206..09b69a6 100644
--- a/client.c
+++ b/client.c
@@ -85,6 +85,7 @@ void DisplayProgressBar100Percent(size_t total){
     buf[PROGRESS_BAR_WIDTH] = '\0';
     printf("\r[%s]: 100%% bytes: %ld/%ld bytes\n",buf,total,total);
 }
+static bool DisplayProgress = true;
 int recvFile(int sock, const char * filename,size_t file_size){
     int fd;
     size_t count = 0;
@@ -118,7 +119,7 @@ int recvFile(int sock, const char * filename,size_t file_size){
             return_value = -1;
             goto END;
         }
-        if( isProgressBarNeedUpdate(count,file_size,cur_progress) ){
+        if( DisplayProgress && isProgressBarNeedUpdate(count,file_size,cur_progress) ){
             DisplayProgressBar(count,file_size,cur_progress);
             cur_progress = (int)((((double)count / (double)file_size)) * 100.0 + 1.0);
             fflush(stdout);
@@ -128,7 +129,8 @@ int recvFile(int sock, const char * filename,size_t file_size){
             usleep(SLOW_CLIENT);
         #endif
     }
-    DisplayProgressBar100Percent(file_size);
+    if(DisplayProgress)
+        DisplayProgressBar100Percent(file_size);
 END:
     free(buf);
     return return_value;
@@ -166,6 +168,17 @@ int recvData(int sock,const char * filename){
 
     return 0;
 }
+struct benchmark_data{
+    bool benchmode;
+    clock_t clock_sum;
+    clock_t begin_sclock;
+    clock_t begin_uclock;
+    int op_count;
+} bench = {0,};
+
+void init_bench_data(){
+    memset(&bench,0,sizeof(bench));
+}
 
 int main(int argc, const char *argv[]){
     struct sockaddr_in addr;
@@ -175,23 +188,26 @@ int main(int argc, const char *argv[]){
     int arg_filename_start = 3;
     int sock, err;
     int retval = 0;
-    bool benchmode = false;
-    
-    clock_t clock_sum = 0;
-    clock_t begin_sclock;
-    clock_t begin_uclock;
-    
-    int op_count = 0;
+    init_bench_data();
+
+
     if (argc < 4){
         fprintf(stderr,"USAUE: %s SERVERNAME PORT [Option]... [FILENAME]...\n",argv[0]);
         return 1;
     }
     server_name = argv[1];
     server_port = atoi(argv[2]);
-    if (strcmp("-b",argv[arg_filename_start])==0
-    ||strcmp("--benchmark",argv[arg_filename_start])==0){
-        arg_filename_start++;
-        benchmode = true;
+    for(;;){
+        if (strcmp("-b",argv[arg_filename_start])==0
+        ||strcmp("--benchmark",argv[arg_filename_start])==0){
+            arg_filename_start++;
+            bench.benchmode = true;
+        }
+        else if(strcmp("--nogui",argv[arg_filename_start])==0){
+            arg_filename_start++;
+            DisplayProgress = false;
+        }
+        else break;
     }
     
     if (server_port == 0){
@@ -214,11 +230,11 @@ int main(int argc, const char *argv[]){
     addr.sin_family = AF_INET;
     addr.sin_port = htons(server_port);
 
-    if (benchmode){
+    if (bench.benchmode){
         struct tms t;
         times(&t);
-        begin_sclock = t.tms_stime;
-        begin_uclock = t.tms_utime;
+        bench.begin_sclock = t.tms_stime;
+        bench.begin_uclock = t.tms_utime;
     }
     while (arg_filename_start < argc){
         filename = argv[arg_filename_start++];
@@ -240,16 +256,16 @@ int main(int argc, const char *argv[]){
             retval += ret;
         }
         close(sock);
-        op_count++;
+        bench.op_count++;
     }
-    if (benchmode){
+    if (bench.benchmode){
         struct tms t;
         times(&t);
-        clock_sum += t.tms_stime - begin_sclock;
-        clock_sum += t.tms_utime - begin_uclock;
+        bench.clock_sum += t.tms_stime - bench.begin_sclock;
+        bench.clock_sum += t.tms_utime - bench.begin_uclock;
     }
-    if (benchmode){
-        fprintf(stdout,"operation: %lf ticks/op\n",((double)clock_sum)/((double)op_count));
+    if (bench.benchmode){
+        fprintf(stdout,"operation: %lf ticks/op\n",((double)bench.clock_sum)/((double)bench.op_count));
     }
     
     return retval;