diff --git a/.gitignore b/.gitignore
index 8bd3a05..8ac8101 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 /.settings/
 /.classpath
 /.project
+/.DS_Store
diff --git a/pom.xml b/pom.xml
index 528fd73..91fa557 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.metadium</groupId>
 	<artifactId>did-sdk-java</artifactId>
-	<version>0.2.0</version>
+	<version>0.2.1</version>
 
 	<name>Metadium DID SDK </name>
 	<description>Java library for Metadium DID</description>
diff --git a/src/main/java/com/metadium/did/MetadiumWallet.java b/src/main/java/com/metadium/did/MetadiumWallet.java
index ba15ff3..b26fcfe 100644
--- a/src/main/java/com/metadium/did/MetadiumWallet.java
+++ b/src/main/java/com/metadium/did/MetadiumWallet.java
@@ -57,15 +57,26 @@ public MetadiumKey getKey() {
 	}
 	
 	/**
-	 * create DID
+	 * Create Did
+	 * @param metaDelegator
+	 * @return
+	 * @throws DidException
+	 */
+	public static MetadiumWallet createDid(MetaDelegator metaDelegator) throws DidException {
+		return createDid(metaDelegator, null);
+	}
+	
+	/**
+	 * create DID from key
 	 * 
 	 * @param metaDelegator {@link MetaDelegator}
+	 * @param key 지갑 키
 	 * @return 생성된 DID 지갑
 	 * @throws DidException
 	 */
-	public static MetadiumWallet createDid(MetaDelegator metaDelegator) throws DidException {
+	public static MetadiumWallet createDid(MetaDelegator metaDelegator, MetadiumKey key) throws DidException {
 		try {
-			MetadiumWallet metadiumDid = new MetadiumWallet(new MetadiumKey());
+			MetadiumWallet metadiumDid = new MetadiumWallet(key == null ? new MetadiumKey() : key);
 			
 			String txHash = metaDelegator.createIdentityDelegated(metadiumDid.key);
 			TransactionReceipt transactionReceipt = Web3jUtils.ethGetTransactionReceipt(metaDelegator.getWeb3j(), txHash);
diff --git a/src/test/java/com/metadium/did/DidTest.java b/src/test/java/com/metadium/did/DidTest.java
index ef15330..4b692a8 100644
--- a/src/test/java/com/metadium/did/DidTest.java
+++ b/src/test/java/com/metadium/did/DidTest.java
@@ -8,9 +8,13 @@
 
 import java.math.BigInteger;
 import java.security.InvalidAlgorithmParameterException;
+import java.security.SecureRandom;
 import java.text.ParseException;
 
 import org.junit.Test;
+import org.web3j.crypto.Bip32ECKeyPair;
+import org.web3j.crypto.ECKeyPair;
+import org.web3j.crypto.MnemonicUtils;
 import org.web3j.utils.Numeric;
 
 import com.metadium.did.crypto.MetadiumKey;
@@ -195,4 +199,31 @@ public void createDidEnterpriseTest() throws DidException, InvalidAlgorithmParam
 		System.out.println("public_key="+didDocument.getPublicKey(wallet.getKid()).getPublicKeyHex());
 		System.out.println("kid="+wallet.getKid());
 	}
+	
+	@Test
+	public void createDidWithMnemonic() throws Exception {
+		// create mnemonic
+        byte[] initialEntropy = new byte[16];
+        new SecureRandom().nextBytes(initialEntropy);
+        String mnemonic = MnemonicUtils.generateMnemonic(initialEntropy);
+        
+        // private to mnemonic
+        byte[] seed = MnemonicUtils.generateSeed(mnemonic, null);
+        Bip32ECKeyPair master = Bip32ECKeyPair.generateKeyPair(seed);
+        ECKeyPair keyPair = Bip32ECKeyPair.deriveKeyPair(master, /*KeyManager.BIP44_META_PATH*/new int[] {44 | 0x80000000, 916 | 0x80000000, 0x80000000, 0, 0});
+
+        // DID 생성
+        MetaDelegator delegator = new MetaDelegator();
+        MetadiumWallet wallet = MetadiumWallet.createDid(delegator, new MetadiumKey(keyPair));
+
+        // did 와 mnemonic 저장
+        String did = wallet.getDid();
+        
+        // did 와 mnemonic 으로 wallet 재생성
+        ECKeyPair newKeyPair = Bip32ECKeyPair.deriveKeyPair(Bip32ECKeyPair.generateKeyPair(MnemonicUtils.generateSeed(mnemonic, null)), /*KeyManager.BIP44_META_PATH*/new int[] {44 | 0x80000000, 916 | 0x80000000, 0x80000000, 0, 0});
+        MetadiumWallet newWallet = new MetadiumWallet(did, new MetadiumKey(newKeyPair));
+        
+        assertEquals(wallet.getDid(), newWallet.getDid());
+        assertEquals(wallet.getKey().getPrivateKey(), newWallet.getKey().getPrivateKey());
+	}
 }