diff --git a/utxomerger/README.md b/utxomerger/README.md
index d53e500..9e9fbbd 100644
--- a/utxomerger/README.md
+++ b/utxomerger/README.md
@@ -3,21 +3,25 @@
 
 > **One last disclaimer:**
 
-**the code we are about to go over is in no way intended to be used as an example of a robust solution.**
+**The code we are about to go over is in no way intended to be used as an example of a robust solution.**
 
 **We wouldn't be responsible for the consequences of using this tool.**
 
-**please check this python code carefully and use it later.**
+**Please check this python code carefully and use it later.**
 
 
-Requirements: Python 3.x, with requests package
+## Preparation
 
-Dependencies:
+- Requirements: Python 3.x, with requests package
+
+- Dependencies:
    ```
     pip install requests
    ```
 
-Usage:
+## Usage:
+
+
    ```
     ./bytomd init --chain_id mainnet
    ```
@@ -27,7 +31,9 @@ Usage:
    ```
    If you don't know how to run bytomd please check this [wiki](https://github.com/Bytom/bytom/wiki/Build-and-Install)
 
-Options:
+- Options:
+
+
   ```
   $ python btmspanner.py utxomerger -h
 usage: btmspanner.py [-h] [-o URL] [-a ACCOUNT_ALIAS] [-p PASSWORD]
@@ -56,12 +62,31 @@ optional arguments:
   
   ```
 
-Example:
+## Example
+
+  
+**eg.01:**
+
+   ```
+$ python btmspanner.py utxomerger -l
+   ```
+   this example can list all utxos at localhost.
+
+**eg.02:**
+
+   ```
+$ python btmspanner.py utxomerger -o http://127.0.0.1:9888 -l
+   ```
+   this example can list all utxos at host http://127.0.0.1:9888.
+
+**eg.03:**
+
    ```
 $ python btmspanner.py utxomerger -o http://127.0.0.1:9888 -a your_account_alias -p your_password -x 41250000000 -s 0 -m 20 -f 3 -y
    ```
 
-Result:
+**Result:**
+
 ```
 $ python btmspanner.py utxomerger -o http://52.83.158.112:9888 -a btmpool_test -p btmpool -x 41250000000 -s 0 -m 20 -f 3 -y
    0.  412.50000000 BTM fac1fa4776c43e2159683c6ce7ffdd64734be2bd982d997b59fa8198c6af4d1c (mature)
diff --git a/utxomerger/merge_utxo.py b/utxomerger/merge_utxo.py
index c9f8291..fb47d04 100644
--- a/utxomerger/merge_utxo.py
+++ b/utxomerger/merge_utxo.py
@@ -85,19 +85,42 @@ def send_tx(connection, utxo_list, to_address, password):
 
 def main():
     options = parser.parse_args()
+
+    if options.only_list:
+        data, ret = UnspentOutputs.list_UTXO(connection=Connection(options.url))
+        if ret == 1:
+            for i, utxo in enumerate(data):
+                print('{:4}. {:13.8f} BTM {}{}'.format(i, utxo['amount'] / 1e8, utxo['id'], ' (mature)'))
+                if i >= 99:
+                    print('...')
+                    print('...')
+                    print('only print 100 utxos.')
+                    break
+            print("total size of available utxos is {}".format(len(data)))
+        elif ret == -1:
+            print("failed error is {}".format(data))
+        else:
+            print(data)
+
+        return
+
     utxo_total = []
     utxolist = list_utxo(options.url, options.account_alias, options.min_amount, options.max_amount)
 
     for i, utxo in enumerate(utxolist):
         print('{:4}. {:13.8f} BTM {}{}'.format(i, utxo['amount'] / 1e8, utxo['id'], ' (mature)'))
+        if i >= 99:
+            print('...')
+            print('...')
+            print('only print 100 utxos.')
+            break
+
+    for i, utxo in enumerate(utxolist):
         if i >= options.merge_list * options.for_loop:
             break
         utxo_total.append(utxo)
 
-    print("total size of available utxos is {}".format(len(utxolist)))
-
-    if options.only_list:
-        return
+    print("total size of available utxos is {}\n".format(len(utxolist)))
 
     print('To merge {} UTXOs with {:13.8f} BTM totally.\n'.format(len(utxo_total),
                                                                   sum(utxo['amount'] for utxo in utxo_total) / 1e8))