diff --git a/devtools/keypair/README.md b/devtools/keypair/README.md
new file mode 100644
index 000000000..87e3a9c38
--- /dev/null
+++ b/devtools/keypair/README.md
@@ -0,0 +1,57 @@
+# Axon Keypair Generator
+
+This is a simple tool to generate keypair used for Axon. 
+
+## Usage
+
+### Generate Keypair
+
+```bash
+cd devtools/keypair & cargo run -- -n number_of_keypair_to_generate -p path_to_save_private_keys
+```
+Example Output:
+
+```bash
+$ cargo run -- -n 1
+{
+  "keypairs": [
+    {
+      "index": 0,
+      "net_private_key": "0x0000000000000000000000000000000000000000000000000000000000000000",
+      "public_key": "0x020044def250d1d27c0f7c0eeee6c8b964756d5ad7936fcefaf3f086245ddb9c9c",
+      "address": "0x83fec4b12b26a70195ccabb67ce0cd692856eaf1",
+      "peer_id": "QmbZEzvonMiPiioRpYeVWxngjN42FHC3EHXjeo2C7o2NDZ",
+      "bls_private_key": "0x1111111111111111111111111111111111111111111111111111111111111111",
+      "bls_public_key": "0x81ca54f01e3b433c209ae1d165e6362669e13170f89712dbc52c3572901d025ecc206a43c4b25f58388189f74587a7d"
+    }
+  ]
+}
+```
+
+The arguments are described in the following table:
+
+| name | short | default value |
+|--|--|--|
+| number | n | 4 |
+| private-key-path | p | current_path/private-binary/ |
+
+### Update Config and Spec File
+
+Firstly, update the `validator_list` in [chain-spec](../chain/specs/single_node/chain-spec.toml) file. Replace the `bls_pub_key`, `pub_key` and `address` with the value generated by the keypair generator.For example:
+
+```toml
+[[params.verifier_list]]
+bls_pub_key = "0x81ca54f01e3b433c209ae1d165e6362669e13170f89712dbc52c3572901d025ecc206a43c4b25f58388189f74587a7d"
+pub_key = "0x020044def250d1d27c0f7c0eeee6c8b964756d5ad7936fcefaf3f086245ddb9c9c"
+address = "0x83fec4b12b26a70195ccabb67ce0cd692856eaf1"
+propose_weight = 1
+vote_weight = 1
+```
+
+Then, update the `bootstraps` in [config](../chain/config.toml) file. Fill the generated `peer_id` to the `multi_address` For example:
+
+```toml
+[[network.bootstraps]]
+multi_address = "/ip4/127.0.0.1/tcp/8001/p2p/QmbZEzvonMiPiioRpYeVWxngjN42FHC3EHXjeo2C7o2NDZ"
+```
+Finally, set the `net_privkey_file` and `bls_privkey_file` with the generated private key file path in [config](../chain/config.toml) file. 
diff --git a/devtools/keypair/src/keypair.yml b/devtools/keypair/src/keypair.yml
index 2681ef65a..08736ef54 100644
--- a/devtools/keypair/src/keypair.yml
+++ b/devtools/keypair/src/keypair.yml
@@ -10,7 +10,7 @@ args:
               long: number
               default_value: "4"
 
-      - binary-path:
+      - private-key-path:
               help: The path to save net and bls private key binary
               short: p
               long: path
diff --git a/devtools/keypair/src/main.rs b/devtools/keypair/src/main.rs
index eb00946b0..b00eee442 100644
--- a/devtools/keypair/src/main.rs
+++ b/devtools/keypair/src/main.rs
@@ -23,6 +23,7 @@ struct Keypair {
 
 #[derive(Default, Serialize, Debug)]
 struct Output {
+    #[serde(skip)]
     pub common_ref: String,
     pub keypairs:   Vec<Keypair>,
 }
@@ -32,7 +33,7 @@ pub fn main() {
     let yml = load_yaml!("keypair.yml");
     let m = App::from(yml).get_matches();
     let number = value_t!(m, "number", usize).unwrap();
-    let path = value_t!(m, "binary-path", String).unwrap();
+    let path = value_t!(m, "private-key-path", String).unwrap();
     let path = PathBuf::from(path);
     let _ = fs::create_dir(path.clone());