diff --git a/server/web3service/metadata/factory.js b/server/web3service/metadata/factory.js
index d7292f5..cff3ecb 100644
--- a/server/web3service/metadata/factory.js
+++ b/server/web3service/metadata/factory.js
@@ -96,7 +96,7 @@ function init() {
                     'Contract'
                    );
 
-  registerMetaClass(configDir + 'marketdb_mysql.json',
+  registerMetaClass(configDir + 'blockchaindb_mysql.json',
                     '',
                     'MarketDb'
                    );
diff --git a/server/web3service/models/log.js b/server/web3service/models/log.js
index d585d59..d55f768 100644
--- a/server/web3service/models/log.js
+++ b/server/web3service/models/log.js
@@ -18,7 +18,7 @@ class Log extends BaseModel {
         fields.push([key, params[key]]);
       }
     }
-    await this.getSession().marketConn
+    await this.getSession().blockChainConn
     (
       'insert',
       't_log',
diff --git a/server/web3service/models/transaction.js b/server/web3service/models/transaction.js
index 6f016da..2d3507a 100644
--- a/server/web3service/models/transaction.js
+++ b/server/web3service/models/transaction.js
@@ -9,7 +9,7 @@ class Transaction extends BaseModel {
       seqId: 0
     };
     const nowTime = utils.getUtcTime();
-    const lastId = await this.getSession().marketConn
+    const lastId = await this.getSession().blockChainConn
     (
       'insertEx',
       't_transaction',
@@ -26,7 +26,7 @@ class Transaction extends BaseModel {
   }
 
   async update(idx, fields) {
-    const err = await this.getSession().marketConn
+    const err = await this.getSession().blockChainConn
     (
       'update',
       't_transaction',
diff --git a/server/web3service/models/used_tokenid.js b/server/web3service/models/used_tokenid.js
index c310ba3..6e1479d 100644
--- a/server/web3service/models/used_tokenid.js
+++ b/server/web3service/models/used_tokenid.js
@@ -14,7 +14,7 @@ class UsedTokenId extends BaseModel {
       ['createtime', nowTime],
       ['modifytime', nowTime],
     ];
-    await this.getSession().marketConn
+    await this.getSession().blockChainConn
     (
       'insert',
       't_used_token_id',
@@ -23,7 +23,7 @@ class UsedTokenId extends BaseModel {
   }
 
   async find(tokenId) {
-    const {err, row} = await this.getSession().marketConn
+    const {err, row} = await this.getSession().blockChainConn
     (
       'ormSelectOne',
       't_used_token_id',
diff --git a/server/web3service/session.js b/server/web3service/session.js
index 149bff7..915e91d 100644
--- a/server/web3service/session.js
+++ b/server/web3service/session.js
@@ -65,9 +65,9 @@ class Session {
     return utils.jsonEncode(this.req.query);
   }
 
-  async getMarketDb() {
+  async getBlockChainDb() {
     const idx = 0;
-    const dbKey = 'MarketDb' + idx;
+    const dbKey = 'BlockChainDb' + idx;
     if (this.useConns[dbKey]) {
       return this.useConns[dbKey];
     }
@@ -106,8 +106,8 @@ class Session {
     return metaFactory[name](this, ...args);
   }
 
-  async marketConn(method, ...args) {
-    const conn = await this.getMarketDb();
+  async blockChainConn(method, ...args) {
+    const conn = await this.getBlockChainDb();
     const ret = await conn[method](...args);
     if (ret.err){
       this.throwError(500, 'internal error');