diff --git a/sample/selectObjectContent.php b/sample/selectObjectContent.php
new file mode 100644
index 00000000..61fd4e94
--- /dev/null
+++ b/sample/selectObjectContent.php
@@ -0,0 +1,54 @@
+<?php
+
+require dirname(__FILE__) . '/../vendor/autoload.php';
+
+$secretId = "COS_SECRETID"; //"云 API 密钥 SecretId";
+$secretKey = "COS_SECRETKEY"; //"云 API 密钥 SecretKey";
+$region = "ap-beijing"; //设置一个默认的存储桶地域
+$cosClient = new Qcloud\Cos\Client(array(
+    'region' => $region,
+    'schema' => 'https', //协议头部，默认为http
+    'credentials'=> array(
+        'secretId'  => $secretId ,
+        'secretKey' => $secretKey
+    )
+));
+try { 
+    $result = $cosClient->selectObjectContent(array( 
+        'Bucket' => $bucket, //格式：BucketName-APPID
+        'Key' => $key, 
+        'Expression' => 'Select * from COSObject s', 
+        'ExpressionType' => 'SQL', 
+        'InputSerialization' => array( 
+            'CompressionType' => 'None', 
+            'CSV' => array( 
+                'FileHeaderInfo' => 'NONE', 
+                'RecordDelimiter' => '\n', 
+                'FieldDelimiter' => ',', 
+                'QuoteEscapeCharacter' => '"', 
+                'Comments' => '#', 
+                'AllowQuotedRecordDelimiter' => 'FALSE' 
+                )   
+            ),  
+        'OutputSerialization' => array( 
+            'CSV' => array( 
+                'QuoteField' => 'ASNEEDED', 
+                'RecordDelimiter' => '\n', 
+                'FieldDelimiter' => ',', 
+                'QuoteCharacter' => '"', 
+                'QuoteEscapeCharacter' => '"' 
+                )   
+            ),  
+        'RequestProgress' => array( 
+                'Enabled' => 'FALSE' 
+        )   
+    ));  
+    // 请求成功
+    foreach ($result['Data'] as $data) { 
+        // 迭代遍历select结果
+        print_r($data); 
+    }
+} catch (\Exception $e) {
+    // 请求失败
+    echo($e); 
+}
diff --git a/src/Qcloud/Cos/Client.php b/src/Qcloud/Cos/Client.php
index b698ab0b..c8ac51ef 100644
--- a/src/Qcloud/Cos/Client.php
+++ b/src/Qcloud/Cos/Client.php
@@ -21,12 +21,14 @@
 
 
 class Client extends GuzzleClient {
-    const VERSION = '2.0.6';
+    const VERSION = '2.0.7';
 
     public $httpClient;
     
     private $api;
     private $desc;
+    private $action;
+    private $operation;
     private $cosConfig;
     private $signature;
     private $rawCosConfig;
@@ -81,9 +83,9 @@ public function __construct($cosConfig) {
 
     public function commandToRequestTransformer(CommandInterface $command)
     {
-        $action = $command->GetName();
-        $opreation = $this->api[$action];
-        $transformer = new CosTransformer($this->cosConfig, $opreation); 
+        $this->action = $command->GetName();
+        $this->operation = $this->api[$this->action];
+        $transformer = new CommandToRequestTransformer($this->cosConfig, $this->operation); 
         $seri = new Serializer($this->desc);
         $request = $seri($command);
         $request = $transformer->bucketStyleTransformer($command, $request);
@@ -96,36 +98,17 @@ public function commandToRequestTransformer(CommandInterface $command)
 
     public function responseToResultTransformer(ResponseInterface $response, RequestInterface $request, CommandInterface $command)
     {
-        $action = $command->getName();
-        if ($action == "GetObject") {
-            if (isset($command['SaveAs'])) {
-                $fp = fopen($command['SaveAs'], "wb");
-                fwrite($fp, $response->getBody());
-                fclose($fp);
-            }
-        }
+        $transformer = new ResultTransformer($this->cosConfig, $this->operation); 
+        $transformer->writeDataToLocal($command, $request, $response);
         $deseri = new Deserializer($this->desc, true);
-        $rsp = $deseri($response, $request, $command);
+        $result = $deseri($response, $request, $command);
 
-        $headers = $response->getHeaders();
-        $metadata = array();
-        foreach ($headers as $key => $value) {
-            if (strpos($key, "x-cos-meta-") === 0) {
-                $metadata[substr($key, 11)] = $value[0];
-            }
-        }
-        if (!empty($metadata)) {
-            $rsp['Metadata'] = $metadata;
-        }
-        if ($command['Key'] != null && $rsp['Key'] == null) {
-            $rsp['Key'] = $command['Key'];
-        }
-        if ($command['Bucket'] != null && $rsp['Bucket'] == null) {
-            $rsp['Bucket'] = $command['Bucket'];
-        }
-        $rsp['Location'] = $request->getHeader("Host")[0] .  $request->getUri()->getPath();
-        return $rsp;
+        $result = $transformer->metaDataTransformer($command, $response, $result);
+        $result = $transformer->extraHeadersTransformer($command, $request, $result);
+        $result = $transformer->selectContentTransformer($command, $result);
+        return $result;
     }
+    
     public function __destruct() {
     }
 
@@ -264,7 +247,7 @@ public function doesObjectExist($bucket, $key, array $options = array())
             return False;
         }
     }
-
+    
     public static function explodeKey($key) {
         // Remove a leading slash if one is found
         $split_key = explode('/', $key && $key[0] == '/' ? substr($key, 1) : $key);
diff --git a/src/Qcloud/Cos/CommandToRequestTransformer.php b/src/Qcloud/Cos/CommandToRequestTransformer.php
new file mode 100644
index 00000000..e39b7a0c
--- /dev/null
+++ b/src/Qcloud/Cos/CommandToRequestTransformer.php
@@ -0,0 +1,162 @@
+<?php
+
+namespace Qcloud\Cos;
+
+use Guzzle\Service\Description\Parameter;
+use Guzzle\Service\Description\ServiceDescription;
+use GuzzleHttp\HandlerStack;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use Qcloud\Cos\Signature;
+use GuzzleHttp\Command\Guzzle\Description;
+use GuzzleHttp\Command\Guzzle\GuzzleClient;
+use GuzzleHttp\Command\CommandInterface;
+use GuzzleHttp\Exception\RequestException;
+use GuzzleHttp\Middleware;
+use GuzzleHttp\Psr7;
+use GuzzleHttp\Psr7\Uri;
+use InvalidArgumentException;
+
+
+class CommandToRequestTransformer {
+    private $config;
+    private $operation;
+
+    public function __construct($config ,$operation) {
+        $this->config = $config;
+        $this->operation = $operation;
+    }
+
+    // format bucket style
+    public function bucketStyleTransformer(CommandInterface $command, RequestInterface $request) {
+        $action = $command->getName();
+        if ($action == 'ListBuckets') {
+            return $request->withUri(new Uri($this->config['schema']."://service.cos.myqcloud.com/"));
+        }
+        $operation = $this->operation;
+        $bucketname = $command['Bucket'];
+
+        $appId = $this->config['appId'];
+        if ($appId != null && endWith($bucketname, '-'.$appId) == False)
+        {
+            $bucketname = $bucketname.'-'.$appId;
+        }
+        $command['Bucket'] = $bucketname;
+        $path = ''; 
+        $http_method = $operation['httpMethod'];
+        $uri = $operation['uri'];
+        
+        // Hoststyle is used by default
+        // Pathstyle
+        if ($this->config['pathStyle'] != true) {
+            if (isset($operation['parameters']['Bucket']) && $command->hasParam('Bucket')) {
+                $uri = str_replace("{Bucket}", '', $uri);
+            }   
+            if (isset($operation['parameters']['Key']) && $command->hasParam('Key')) {
+                $uri = str_replace("{/Key*}", encodeKey($command['Key']), $uri);
+            }
+        }
+        $origin_host = $bucketname. '.cos.' . $this->config['region'] . '.' . $this->config['endpoint'];
+        // domain
+        if ($this->config['domain'] != null) {
+            $origin_host = $this->config['domain'];
+        }
+        $host = $origin_host;
+        if ($this->config['ip'] != null) {
+            $host = $this->config['ip'];
+            if ($this->config['port'] != null) {
+                $host = $this->config['ip'] . ":" . $this->config['port'];
+            }
+        }
+
+
+        $path = $this->config['schema'].'://'. $host . $uri;
+        $uri = new Uri($path);
+        $query = $request->getUri()->getQuery();
+        if ($uri->getQuery() != $query && $uri->getQuery() != "") {
+            $query =   $uri->getQuery() . "&" . $request->getUri()->getQuery();
+        }
+        $uri = $uri->withQuery($query);
+        $request = $request->withUri($uri);
+        $request = $request->withHeader('Host', $origin_host);
+        return $request;
+    }
+
+    // format upload body
+    public function uploadBodyTransformer(CommandInterface $command, $request, $bodyParameter = 'Body', $sourceParameter = 'SourceFile') {
+        
+        $operation = $this->operation;
+        if (!isset($operation['parameters']['Body'])) {
+            return $request;
+        }
+        $source = isset($command[$sourceParameter]) ? $command[$sourceParameter] : null;
+        $body = isset($command[$bodyParameter]) ? $command[$bodyParameter] : null;
+        // If a file path is passed in then get the file handle
+        if (is_string($source) && file_exists($source)) {
+            $body = fopen($source, 'rb');
+        }
+        // Prepare the body parameter and remove the source file parameter
+        if (null !== $body) {
+            return $request;
+        } else {
+            throw new InvalidArgumentException(
+                "You must specify a non-null value for the {$bodyParameter} or {$sourceParameter} parameters.");
+        }
+    }
+
+    // update md5
+    public function md5Transformer(CommandInterface $command, $request) {
+        $operation = $this->operation;
+        if (isset($operation['data']['contentMd5'])) {
+            $request = $this->addMd5($request);
+        }
+        if (isset($operation['parameters']['ContentMD5']) &&
+            isset($command['ContentMD5'])) {
+            $value = $command['ContentMD5'];
+            if ($value === true) {
+                $request = $this->addMd5($request);
+            }
+        }
+
+        return $request;
+    }
+
+    // add meta
+    public function metadataTransformer(CommandInterface $command, $request) {
+        $operation = $this->operation;
+        if (isset($command['Metadata'])) {
+            $meta = $command['Metadata'];
+            foreach ($meta as $key => $value) {
+                $request = $request->withHeader('x-cos-meta-' . $key, $value);
+            }
+        }
+        return $request;
+    }
+
+    // count md5
+    private function addMd5($request) {
+        $body = $request->getBody();
+        if ($body && $body->getSize() > 0) {
+            $md5 = base64_encode(md5($body, true));
+            return $request->withHeader('Content-MD5', $md5);
+        }
+        return $request;
+    }
+
+    // inventoryId
+    public function specialParamTransformer(CommandInterface $command, $request) {
+        $action = $command->getName();
+        if ($action == 'PutBucketInventory') {
+            $id = $command['Id'];
+            $uri = $request->getUri();
+            $query = $uri->getQuery();
+            $uri = $uri->withQuery($query . "&Id=".$id);
+            return $request->withUri($uri);
+        }
+        return $request;
+    }
+
+    public function __destruct() {
+    }
+
+}
diff --git a/src/Qcloud/Cos/ResultTransformer.php b/src/Qcloud/Cos/ResultTransformer.php
new file mode 100644
index 00000000..02afc84c
--- /dev/null
+++ b/src/Qcloud/Cos/ResultTransformer.php
@@ -0,0 +1,119 @@
+<?php
+
+namespace Qcloud\Cos;
+
+use Guzzle\Service\Description\Parameter;
+use Guzzle\Service\Description\ServiceDescription;
+use GuzzleHttp\HandlerStack;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use Qcloud\Cos\Signature;
+use GuzzleHttp\Command\Guzzle\Description;
+use GuzzleHttp\Command\Guzzle\GuzzleClient;
+use GuzzleHttp\Command\CommandInterface;
+use GuzzleHttp\Exception\RequestException;
+use GuzzleHttp\Middleware;
+use GuzzleHttp\Psr7;
+use GuzzleHttp\Psr7\Uri;
+use GuzzleHttp\Command\Result;
+use InvalidArgumentException;
+
+
+class ResultTransformer {
+    private $config;
+    private $operation;
+
+    public function __construct($config, $operation) {
+        $this->config = $config;
+        $this->operation = $operation;
+    }
+
+    public function writeDataToLocal(CommandInterface $command, RequestInterface $request, ResponseInterface $response) {
+        $action = $command->getName();
+        if ($action == "GetObject") {
+            if (isset($command['SaveAs'])) {
+                $fp = fopen($command['SaveAs'], "wb");
+                fwrite($fp, $response->getBody());
+                fclose($fp);
+            }
+        }
+    }
+
+    public function metaDataTransformer(CommandInterface $command, ResponseInterface $response, Result $result) {
+        $headers = $response->getHeaders();
+        $metadata = array();
+        foreach ($headers as $key => $value) {
+            if (strpos($key, "x-cos-meta-") === 0) {
+                $metadata[substr($key, 11)] = $value[0];
+            }
+        }
+        if (!empty($metadata)) {
+            $result['Metadata'] = $metadata;
+        }
+        return $result;
+    }
+
+    public function extraHeadersTransformer(CommandInterface $command, RequestInterface $request, Result $result) {
+        if ($command['Key'] != null && $result['Key'] == null) {
+            $result['Key'] = $command['Key'];
+        }
+        if ($command['Bucket'] != null && $result['Bucket'] == null) {
+            $result['Bucket'] = $command['Bucket'];
+        }
+        $result['Location'] = $request->getHeader("Host")[0] .  $request->getUri()->getPath();
+        return $result;
+    }
+
+    public function selectContentTransformer(CommandInterface $command, Result $result) {
+        $action = $command->getName();
+        if ($action == "SelectObjectContent") {
+            $result['Data'] = $this->getSelectContents($result);
+        }
+        return $result;
+    }
+
+    public function getSelectContents($result) {
+        $f = $result['RawData'];
+        while (!$f->eof()) {
+            $data = array();
+            $tmp = $f->read(4);
+            if (empty($tmp)) {
+                break;
+            }
+            $totol_length = (int)(unpack("N", $tmp)[1]);
+            $headers_length = (int)(unpack("N", $f->read(4))[1]);
+            $body_length = $totol_length - $headers_length - 16;
+            $predule_crc = (int)(unpack("N", $f->read(4))[1]);
+            $headers = array();
+            for ($offset = 0; $offset < $headers_length;) {
+                $key_length = (int)(unpack("C", $f->read(1))[1]);
+                $key = $f->read($key_length);
+    
+                $head_value_type = (int)(unpack("C", $f->read(1))[1]);
+    
+                $value_length = (int)(unpack("n", $f->read(2))[1]);
+                $value = $f->read($value_length);
+                $offset += 4 + $key_length + $value_length;
+                if ($key == ":message-type") {
+                    $data['MessageType'] = $value;
+                }
+                if ($key == ":event-type") {
+                    $data['EventType'] = $value;
+                }
+                if ($key == ":error-code") {
+                    $data['ErrorCode'] = $value;
+                }
+                if ($key == ":error-message") {
+                    $data['ErrorMessage'] = $value;
+                }
+            }
+            $body = $f->read($body_length);
+            $message_crc = (int)(unpack("N", $f->read(4))[1]);
+            $data['Body'] = $body;
+            yield $data;
+        }
+    }
+    public function __destruct() {
+    }
+
+}
diff --git a/src/Qcloud/Cos/Service.php b/src/Qcloud/Cos/Service.php
index 69adbf4e..ffd3a3e0 100644
--- a/src/Qcloud/Cos/Service.php
+++ b/src/Qcloud/Cos/Service.php
@@ -4243,7 +4243,7 @@ public static function getService() {
                         'Parts' => array(
                             'type' => 'array',
                             'location' => 'xml',
-                            'sentAs' => 'Parts',
+                            'sentAs' => 'Part',
                             'data' => array(
                                 'xmlFlattened' => true
                             ),
@@ -4827,7 +4827,7 @@ public static function getService() {
                     'type' => 'object',
                     'additionalProperties' => true,
                     'properties' => array(
-                        'Data' => array(
+                        'RawData' => array(
                             'type' => 'string',
                             'instanceOf' => 'GuzzleHttp\\Psr7\\Stream',
                             'location' => 'body',