diff --git a/sdk/auth/credentials/access_key_creditial.go b/sdk/auth/credentials/access_key_creditial.go
new file mode 100644
index 0000000..8230ae7
--- /dev/null
+++ b/sdk/auth/credentials/access_key_creditial.go
@@ -0,0 +1,11 @@
+package credentials
+
+type BaseCredential struct {
+	AccessKeyId     string
+	AccessKeySecret string
+}
+
+type AccessKeyCredential struct {
+	AccessKeyId     string
+	AccessKeySecret string
+}
diff --git a/sdk/auth/crediantial.go b/sdk/auth/crediantial.go
index d07f45f..29338e7 100644
--- a/sdk/auth/crediantial.go
+++ b/sdk/auth/crediantial.go
@@ -1,6 +1,4 @@
 package auth
 
-type Creditial struct {
-	AccessKeyId     string
-	AccessKeySecret string
+type Credential interface {
 }
diff --git a/sdk/auth/http_build_param.go b/sdk/auth/http_build_param.go
new file mode 100644
index 0000000..c331384
--- /dev/null
+++ b/sdk/auth/http_build_param.go
@@ -0,0 +1,28 @@
+package auth
+
+import (
+	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/requests"
+	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/utils"
+	"net/url"
+	"strings"
+)
+
+func buildRpcStringToSign(request requests.AcsRequest) (stringToSign string) {
+	signParams := make(map[string]string)
+	for key, value := range request.GetQueryParams() {
+		signParams[key] = value
+	}
+	for key, value := range request.GetFormParams() {
+		signParams[key] = value
+	}
+
+	stringToSign = utils.GetUrlFormedMap(signParams)
+	stringToSign = strings.Replace(stringToSign, "+", "%20", -1)
+	stringToSign = strings.Replace(stringToSign, "*", "%2A", -1)
+	stringToSign = strings.Replace(stringToSign, "%7E", "~", -1)
+	stringToSign = url.QueryEscape(stringToSign)
+	stringToSign = request.GetMethod() + "&%2F&" + stringToSign
+	return
+}
+
+
diff --git a/sdk/auth/signer.go b/sdk/auth/signer.go
new file mode 100644
index 0000000..5c7f331
--- /dev/null
+++ b/sdk/auth/signer.go
@@ -0,0 +1,32 @@
+package auth
+
+import (
+	"errors"
+	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/auth/credentials"
+	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/auth/signers"
+	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/requests"
+	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/responses"
+)
+
+type Signer interface {
+	GetName() string
+	Sign(stringToSign, secretSuffix string) string
+}
+
+
+func NewSignerWithCredential(credential Credential, commonApi func(request *requests.CommonRequest, signer interface{}) (response *responses.CommonResponse, err error)) (signer Signer, err error) {
+	switch instance := credential.(type) {
+	case *credentials.AccessKeyCredential:
+		signer = signers.NewAccessKeySigner(instance)
+	default:
+		err = errors.New("UnsupportedCredentialErrorCode  = SDK.UnsupportedCredential")
+	}
+	return
+}
+
+
+
+func Sign(request requests.AcsRequest, signer Signer, regionId string) (err error) {
+
+
+}
\ No newline at end of file
diff --git a/sdk/auth/signers/access_key_siginer.go b/sdk/auth/signers/access_key_siginer.go
new file mode 100644
index 0000000..25805a1
--- /dev/null
+++ b/sdk/auth/signers/access_key_siginer.go
@@ -0,0 +1,41 @@
+package signers
+
+import (
+	"crypto/hmac"
+	"crypto/sha1"
+	"encoding/base64"
+	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/auth/credentials"
+)
+
+type AccessKeySigner struct {
+	credential *credentials.AccessKeyCredential
+}
+
+func NewAccessKeySigner(credential *credentials.AccessKeyCredential) *AccessKeySigner {
+	return &AccessKeySigner{
+		credential: credential,
+	}
+}
+
+
+func (*AccessKeySigner) GetName() string {
+	return "HMAC-SHA1"
+}
+
+
+func (signer *AccessKeySigner) Sign(stringToSign, secretSuffix string) string {
+	secret := signer.credential.AccessKeySecret + secretSuffix
+	return ShaHmac1(stringToSign, secret)
+}
+
+
+func ShaHmac1(source, secret string) string {
+	key := []byte(secret)
+	hmac := hmac.New(sha1.New, key)
+	hmac.Write([]byte(source))
+	signedBytes := hmac.Sum(nil)
+	signedString := base64.StdEncoding.EncodeToString(signedBytes)
+	return signedString
+}
+
+
diff --git a/sdk/client.go b/sdk/client.go
index 6372ca7..043cfaf 100644
--- a/sdk/client.go
+++ b/sdk/client.go
@@ -4,8 +4,8 @@ import (
 	"context"
 	"fmt"
 	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/auth"
-	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/request"
-	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/response"
+	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/requests"
+	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/responses"
 	"net"
 	"net/http"
 	"runtime"
@@ -22,13 +22,13 @@ type Client struct {
 	Host           string
 	httpClient     *http.Client
 	isInsecure     bool
-	signer         *auth.Creditial
+	signer         auth.Signer
 	readTimeout    time.Duration
 	connectTimeout time.Duration
 	config         *Config
 }
 
-func (client *Client) InitWithOptions(host string, config *Config, creditial auth.Creditial) (err error) {
+func (client *Client) InitWithOptions(host string, config *Config, creditial auth.Credential) (err error) {
 	client.httpClient = &http.Client{}
 
 	if config.Transport != nil {
@@ -41,6 +41,9 @@ func (client *Client) InitWithOptions(host string, config *Config, creditial aut
 		client.httpClient.Timeout = config.Timeout
 	}
 
+
+	client.signer, err = auth.NewSignerWithCredential(credential, client.ProcessCommonRequestWithSigner)
+
 	return nil
 }
 
@@ -52,6 +55,16 @@ func (client *Client) InitWithConfig() (config *Config) {
 	}
 }
 
+
+func (client *Client) ProcessCommonRequestWithSigner(request *requests.CommonRequest, signerInterface interface{}) (response *responses.CommonResponse, err error) {
+	if signer, isSigner := signerInterface.(auth.Signer); isSigner {
+		response = responses.NewCommonResponse()
+		err = client.DoActionWithSigner(request, response, signer)
+		return
+	}
+	panic("should not be here")
+}
+
 func Timeout(connectTimeout time.Duration) func(ctx context.Context, net, addr string) (c net.Conn, err error) {
 	return func(ctx context.Context, network, address string) (c net.Conn, err error) {
 		return (&net.Dialer{
@@ -61,7 +74,7 @@ func Timeout(connectTimeout time.Duration) func(ctx context.Context, net, addr s
 	}
 }
 
-func (client *Client) setTimeOut(request request.AcsRequest) {
+func (client *Client) setTimeOut(request requests.AcsRequest) {
 	readTimeout, connectTimeout := client.getTimeOut(request)
 	client.httpClient.Timeout = readTimeout
 	if trans, ok := client.httpClient.Transport.(*http.Transport); ok && trans != nil {
@@ -74,7 +87,7 @@ func (client *Client) setTimeOut(request request.AcsRequest) {
 	}
 }
 
-func (client *Client) getTimeOut(request request.AcsRequest) (time.Duration, time.Duration) {
+func (client *Client) getTimeOut(request requests.AcsRequest) (time.Duration, time.Duration) {
 	readTimeOut := defaultReadTimeout
 	connectTimeOut := defaultConnectTimeout
 
@@ -96,6 +109,10 @@ func (client *Client) getTimeOut(request request.AcsRequest) (time.Duration, tim
 	return readTimeOut, connectTimeOut
 }
 
-func (client *Client) DoAction(request request.AcsRequest, response response.AcsResponse) (err error) {
+func (client *Client) DoAction(request requests.AcsRequest, response responses.AcsResponse) (err error) {
+	return client.DoActionWithSigner(request, response, nil)
+}
+
+func (client *Client) DoActionWithSigner(request requests.AcsRequest, response responses.AcsResponse, signer auth.Signer) (err error) {
 	return nil
 }
diff --git a/sdk/request/request.go b/sdk/request/request.go
deleted file mode 100644
index fb27e06..0000000
--- a/sdk/request/request.go
+++ /dev/null
@@ -1,17 +0,0 @@
-package request
-
-import "time"
-
-type AcsRequest interface {
-	GetReadTimeout() time.Duration
-	GetConnectTimeout() time.Duration
-	SetReadTimeout(readTimeOut time.Duration)
-	SetConnectTimeout(connectTimeOut time.Duration)
-}
-
-type baseRequest struct {
-	Scheme string
-	Method string
-	Host   string
-	Domain string
-}
diff --git a/sdk/request/rpc_request.go b/sdk/request/rpc_request.go
deleted file mode 100644
index c1464d5..0000000
--- a/sdk/request/rpc_request.go
+++ /dev/null
@@ -1,5 +0,0 @@
-package request
-
-type RpcRequest struct {
-	*baseRequest
-}
diff --git a/sdk/requests/common_request.go b/sdk/requests/common_request.go
new file mode 100644
index 0000000..f442971
--- /dev/null
+++ b/sdk/requests/common_request.go
@@ -0,0 +1,5 @@
+package requests
+
+type CommonRequest struct {
+	*baseRequest
+}
diff --git a/sdk/requests/http_request.go b/sdk/requests/http_request.go
new file mode 100644
index 0000000..53c93a6
--- /dev/null
+++ b/sdk/requests/http_request.go
@@ -0,0 +1,5 @@
+package requests
+
+type HttpRequest struct {
+	*baseRequest
+}
diff --git a/sdk/requests/request.go b/sdk/requests/request.go
new file mode 100644
index 0000000..f720067
--- /dev/null
+++ b/sdk/requests/request.go
@@ -0,0 +1,129 @@
+package requests
+
+import (
+	"time"
+)
+
+const (
+	RPC = "RPC"
+	ROA = "ROA"
+
+	HTTP  = "HTTP"
+	HTTPS = "HTTPS"
+
+	DefaultHttpPort = "80"
+
+	GET     = "GET"
+	PUT     = "PUT"
+	POST    = "POST"
+	DELETE  = "DELETE"
+	PATCH   = "PATCH"
+	HEAD    = "HEAD"
+	OPTIONS = "OPTIONS"
+
+	Json = "application/json"
+	Xml  = "application/xml"
+	Raw  = "application/octet-stream"
+	Form = "application/x-www-form-urlencoded"
+
+	Header = "Header"
+	Query  = "Query"
+	Body   = "Body"
+	Path   = "Path"
+
+	HeaderSeparator = "\n"
+)
+
+type AcsRequest interface {
+	GetReadTimeout() time.Duration
+	GetConnectTimeout() time.Duration
+	SetReadTimeout(readTimeOut time.Duration)
+	SetConnectTimeout(connectTimeOut time.Duration)
+	SetHTTPSInsecure(isInsecure bool)
+	GetHTTPSInsecure() *bool
+	GetQueryParams() map[string]string
+	GetFormParams() map[string]string
+	GetMethod() string
+	SetStringToSign(stringToSign string)
+}
+
+type baseRequest struct {
+	Scheme         string
+	Method         string
+	Host           string
+	Domain         string
+	From           string
+	ReadTimeout    time.Duration
+	ConnectTimeout time.Duration
+	isInsecure     *bool
+
+	AcceptFormat string
+
+	userAgent map[string]string
+	product   string
+	version   string
+
+	QueryParams map[string]string
+	Headers     map[string]string
+	FormParams  map[string]string
+	Content     []byte
+
+	queries      string
+	stringToSign string
+}
+
+func (request *baseRequest) GetMethod() string {
+	return request.Method
+}
+
+func (request *baseRequest) GetFormParams() map[string]string {
+	return request.FormParams
+}
+
+func (request *baseRequest) GetQueryParams() map[string]string {
+	return request.QueryParams
+}
+
+func (request *baseRequest) SetHTTPSInsecure(isInsecure bool) {
+	request.isInsecure = &isInsecure
+}
+
+func (request *baseRequest) GetHTTPSInsecure() *bool {
+	return request.isInsecure
+}
+
+func (request *baseRequest) GetReadTimeout() time.Duration {
+	return request.ReadTimeout
+}
+
+func (request *baseRequest) GetConnectTimeout() time.Duration {
+	return request.ConnectTimeout
+}
+
+func (request *baseRequest) SetReadTimeout(readTimeOut time.Duration) {
+	request.ReadTimeout = readTimeOut
+}
+
+func (request *baseRequest) SetConnectTimeout(connectTimeOut time.Duration) {
+	request.ConnectTimeout = connectTimeOut
+}
+
+func (request *baseRequest) SetStringToSign(stringToSign string) {
+	request.stringToSign = stringToSign
+}
+
+func defaultBaseRequest() (request *baseRequest) {
+	request = &baseRequest{
+		Scheme:       "",
+		AcceptFormat: "JSON",
+		Method:       GET,
+		QueryParams:  make(map[string]string),
+		Headers: map[string]string{
+			"x-sdk-client":      "golang/1.0.0",
+			"x-sdk-invoke-type": "normal",
+			"Accept-Encoding":   "identity",
+		},
+		FormParams: make(map[string]string),
+	}
+	return
+}
diff --git a/sdk/response/response.go b/sdk/response/response.go
deleted file mode 100644
index 25c14ba..0000000
--- a/sdk/response/response.go
+++ /dev/null
@@ -1,4 +0,0 @@
-package response
-
-type AcsResponse interface {
-}
diff --git a/sdk/responses/response.go b/sdk/responses/response.go
new file mode 100644
index 0000000..d94d18b
--- /dev/null
+++ b/sdk/responses/response.go
@@ -0,0 +1,75 @@
+package responses
+
+import (
+	"io/ioutil"
+	"net/http"
+)
+
+type AcsResponse interface {
+	IsSuccess() bool
+	GetHttpStatus() int
+	GetHttpHeaders() map[string][]string
+	GetHttpContentString() string
+	GetHttpContentBytes() []byte
+	GetOriginHttpResponse() *http.Response
+	parseFromHttpResponse(httpResponse *http.Response) error
+}
+
+type BaseResponse struct {
+	httpStatus         int
+	httpHeaders        map[string][]string
+	httpContentString  string
+	httpContentBytes   []byte
+	originHttpResponse *http.Response
+}
+
+func (baseResponse *BaseResponse) GetHttpStatus() int {
+	return baseResponse.httpStatus
+}
+
+func (baseResponse *BaseResponse) GetHttpHeaders() map[string][]string {
+	return baseResponse.httpHeaders
+}
+
+func (baseResponse *BaseResponse) GetHttpContentString() string {
+	return baseResponse.httpContentString
+}
+
+func (baseResponse *BaseResponse) GetHttpContentBytes() []byte {
+	return baseResponse.httpContentBytes
+}
+
+func (baseResponse *BaseResponse) GetOriginHttpResponse() *http.Response {
+	return baseResponse.originHttpResponse
+}
+
+func (baseResponse *BaseResponse) IsSuccess() bool {
+	if baseResponse.GetHttpStatus() >= 200 && baseResponse.GetHttpStatus() < 300 {
+		return true
+	}
+	return false
+}
+
+func (baseResponse *BaseResponse) parseFromHttpResponse(httpResponse *http.Response) (err error) {
+	defer httpResponse.Body.Close()
+	body, err := ioutil.ReadAll(httpResponse.Body)
+	if err != nil {
+		return
+	}
+	baseResponse.httpStatus = httpResponse.StatusCode
+	baseResponse.httpHeaders = httpResponse.Header
+	baseResponse.httpContentBytes = body
+	baseResponse.httpContentString = string(body)
+	baseResponse.originHttpResponse = httpResponse
+	return
+}
+
+type CommonResponse struct {
+	*BaseResponse
+}
+
+func NewCommonResponse() (response *CommonResponse) {
+	return &CommonResponse{
+		BaseResponse: &BaseResponse{},
+	}
+}
diff --git a/sdk/utils/utils.go b/sdk/utils/utils.go
new file mode 100644
index 0000000..824ef58
--- /dev/null
+++ b/sdk/utils/utils.go
@@ -0,0 +1,12 @@
+package utils
+
+import "net/url"
+
+func GetUrlFormedMap(source map[string]string) (urlEncoded string) {
+	urlEncoder := url.Values{}
+	for key, value := range source {
+		urlEncoder.Add(key, value)
+	}
+	urlEncoded = urlEncoder.Encode()
+	return
+}