diff --git a/.gitignore b/.gitignore
index fabfaa2..c612456 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,2 @@
 .idea
-tpcc_gener
+tpccgen
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e129618
--- /dev/null
+++ b/README.md
@@ -0,0 +1,65 @@
+# tpccgen
+
+A command line utility to generate/import/test via [go-tpc](https://github.com/pingcap/go-tpc)
+
+## Install
+
+```bash
+go build -o tpccgen main.go
+```
+
+## Flags
+
+```bash
+Usage of ./tpccgen:
+  -all
+        do all the actions (default true)
+  -csv
+        generate tpcc csv files
+  -data-dir string
+        data source directory of lightning
+  -db string
+        test database name (default "tpcc")
+  -deploy-dir string
+        directory path of cluster deployment
+  -download-url string
+        url of the go-tpc binary to download (default "https://github.com/pingcap/go-tpc/releases/download/v1.0.0/go-tpc_1.0.0_linux_amd64.tar.gz")
+  -importer-ip string
+        ip address of tikv-importer
+  -lightning-ip string
+        ip address of tidb-lightnings
+  -restore
+        start lightning, importer and restore files
+  -skip-download
+        skip downloading the go-tpc binary
+  -test
+        run tpcc test
+  -threads int
+        number of threads (default 40)
+  -tidb-ip string
+        ip of tidb-server (default "127.0.0.1")
+  -tidb-port string
+        port of tidb-server (default "4000")
+  -warehouse int
+        number of warehouses (default 100)
+```
+
+## Usage
+
+By default, tpccgen will automatically take 3 actions:
+
+1. download [go-tpc](https://github.com/pingcap/go-tpc) binary
+2. generate csv data
+3. import csv data through [tidb-lightning](https://github.com/pingcap/tidb-lightning)
+
+You can also add some flags you want. For example:
+
+```bash
+./tpccgen --lightning-ip 172.16.5.90 --importer-ip 172.16.5.89 --data-dir /data/lightning --tidb-ip 172.16.5.84 --tidb-port 4111 --deploy-dir /data/deploy --db test --threads 40 --warehouse 10
+```
+
+If you want to perform tpcc test, you must add `--test` flag just like the command below:
+
+```bash
+./tpccgen --test --lightning-ip 172.16.5.90 --tidb-ip 172.16.5.84 --tidb-port 4111 --db test --threads 40 --warehouse 10
+```
diff --git a/main.go b/main.go
index b5f2581..5f0983c 100644
--- a/main.go
+++ b/main.go
@@ -39,7 +39,7 @@ const (
 )
 
 var (
-	all     = flag.Bool(nmAll, true, "do all the actions")
+	all     = flag.Bool(nmAll, true, "do all the actions, test is not included")
 	csv     = flag.Bool(nmCSV, false, "generate tpcc csv files")
 	test    = flag.Bool(nmTest, false, "run tpcc test")
 	restore = flag.Bool(nmRestore, false, "start lightning, importer and restore files")
@@ -82,18 +82,18 @@ func main() {
 		os.Exit(1)
 	}
 
+	// If test flag is enabled, just run tpcc test.
 	if *test {
-		var checkTime time.Time
+		var testStart time.Time
 		if err = runTPCCTest(lightningIPs[0], *tidbIP, *tidbPort, *dbName, *warehouse, *threads); err != nil {
 			fmt.Println(err.Error())
 			os.Exit(1)
 		}
 		fmt.Println("tpcc test finished successfully!")
-		fmt.Println("prepare cost:", time.Since(start).String(), "test cost:", time.Since(checkTime).String())
+		fmt.Println("prepare cost:", time.Since(start).String(), "test cost:", time.Since(testStart).String())
 		os.Exit(0)
 	}
 
-
 	if *all || *csv {
 		if err = dropDB(*tidbIP, *tidbPort, *dbName); err != nil {
 			os.Exit(1)