diff --git a/opengemini/client.go b/opengemini/client.go
index e6fe79d..3297d82 100644
--- a/opengemini/client.go
+++ b/opengemini/client.go
@@ -1 +1,124 @@
 package opengemini
+
+import (
+	"crypto/tls"
+	"errors"
+)
+
+var _ OpenGemini = (*Client)(nil)
+
+type Options = func(client *Client) error
+
+type Client struct {
+	Addresses   []*Address
+	AuthConfig  *AuthConfig
+	BatchConfig *BatchConfig
+	GzipEnable  bool
+	TlsConfig   *tls.Config
+}
+
+func NewClient(addresses []*Address, options ...Options) (*Client, error) {
+	client := new(Client)
+	if len(addresses) == 0 {
+		return nil, errors.New("must have at least one address")
+	}
+	client.Addresses = addresses
+	for _, op := range options {
+		err := op(client)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return client, nil
+}
+
+func WithPassword(username, password string) Options {
+	return func(client *Client) error {
+		client.AuthConfig = &AuthConfig{
+			AuthType: Password,
+			UserName: username,
+			Password: password,
+		}
+		return nil
+	}
+}
+
+func WithToken(token string) Options {
+	return func(client *Client) error {
+		client.AuthConfig = &AuthConfig{
+			AuthType: Token,
+			Token:    token,
+		}
+		return nil
+	}
+}
+
+func WithGzipEnable(enable bool) Options {
+	return func(client *Client) error {
+		client.GzipEnable = enable
+		return nil
+	}
+}
+
+func WithBatchConfig(enable bool, size, interval int) Options {
+	return func(client *Client) error {
+		if enable && (size <= 0 || interval <= 0) {
+			return errors.New("if batch enable , size and interval must more than 0")
+		}
+		client.BatchConfig = &BatchConfig{
+			enable,
+			interval,
+			size,
+		}
+		return nil
+	}
+}
+
+func WithTlsConfig(tls *tls.Config) Options {
+	return func(client *Client) error {
+		client.TlsConfig = tls
+		return nil
+	}
+}
+
+type Address struct {
+	Host string
+	Port int
+}
+
+type AuthType int
+
+const (
+	Password AuthType = iota
+	Token
+)
+
+type AuthConfig struct {
+	AuthType AuthType
+	UserName string
+	Password string
+	Token    string
+}
+
+type BatchConfig struct {
+	BatchEnable   bool
+	BatchInterval int
+	BatchSize     int
+}
+
+type OpenGemini interface {
+	WriteBatchPoint(points BatchPoints)
+	WritePoint(point Point)
+	//WriteLineProtocol()
+	//Query()
+}
+
+func (c *Client) WriteBatchPoint(points BatchPoints) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (c *Client) WritePoint(point Point) {
+	//TODO implement me
+	panic("implement me")
+}