diff --git a/kernel/conf/sync.go b/kernel/conf/sync.go
index a5899e9cb..adcae7861 100644
--- a/kernel/conf/sync.go
+++ b/kernel/conf/sync.go
@@ -23,7 +23,7 @@ type Sync struct {
 	Synced              int64  `json:"synced"`              // 最近同步时间
 	Stat                string `json:"stat"`                // 最近同步统计信息
 	GenerateConflictDoc bool   `json:"generateConflictDoc"` // 云端同步冲突时是否生成冲突文档
-	Provider            int    `json:"provider"`            // 云端存储服务提供者，0：思源官方，1：第三方对象存储服务
+	Provider            int    `json:"provider"`            // 云端存储服务提供者，0：思源官方，1：第三方七牛云，2：S3 协议对象存储
 	OSS                 *OSS   `json:"oss"`                 // 对象存储服务配置
 }
 
@@ -33,7 +33,7 @@ func NewSync() *Sync {
 		Enabled:             false,
 		Mode:                1,
 		GenerateConflictDoc: false,
-		Provider:            0,
+		Provider:            ProviderSiYuan,
 	}
 }
 
@@ -44,3 +44,9 @@ type OSS struct {
 	Regin     string `json:"regin"`     // 存储区域
 	Bucket    string `json:"bucket"`    // 存储空间
 }
+
+const (
+	ProviderSiYuan = 0
+	ProviderQiniu  = 1
+	ProviderS3     = 2
+)
diff --git a/kernel/model/conf.go b/kernel/model/conf.go
index 669e643c2..6327a278a 100644
--- a/kernel/model/conf.go
+++ b/kernel/model/conf.go
@@ -242,6 +242,9 @@ func InitConf() {
 	if 0 == Conf.Sync.Mode {
 		Conf.Sync.Mode = 1
 	}
+	if nil == Conf.Sync.OSS {
+		Conf.Sync.OSS = &conf.OSS{}
+	}
 
 	if nil == Conf.Api {
 		Conf.Api = conf.NewAPI()
diff --git a/kernel/model/repository.go b/kernel/model/repository.go
index a17517703..d40839bd3 100644
--- a/kernel/model/repository.go
+++ b/kernel/model/repository.go
@@ -41,6 +41,7 @@ import (
 	"github.com/siyuan-note/httpclient"
 	"github.com/siyuan-note/logging"
 	"github.com/siyuan-note/siyuan/kernel/cache"
+	"github.com/siyuan-note/siyuan/kernel/conf"
 	"github.com/siyuan-note/siyuan/kernel/sql"
 	"github.com/siyuan-note/siyuan/kernel/treenode"
 	"github.com/siyuan-note/siyuan/kernel/util"
@@ -816,12 +817,20 @@ func newRepository() (ret *dejavu.Repo, err error) {
 		return
 	}
 
-	// TODO: 数据同步支持接入第三方对象存储服务 https://github.com/siyuan-note/siyuan/issues/6426
-	cloudSiYuan := &cloud.SiYuan{BaseCloud: &cloud.BaseCloud{Conf: cloudConf}}
+	var cloudRepo cloud.Cloud
+	switch Conf.Sync.Provider {
+	case conf.ProviderSiYuan:
+		cloudRepo = &cloud.SiYuan{BaseCloud: &cloud.BaseCloud{Conf: cloudConf}}
+	case conf.ProviderQiniu:
+		cloudRepo = &cloud.Qiniu{BaseCloud: &cloud.BaseCloud{Conf: cloudConf}}
+	default:
+		err = fmt.Errorf("unknown cloud provider [%d]", Conf.Sync.Provider)
+		return
+	}
 
 	ignoreLines := getIgnoreLines()
 	ignoreLines = append(ignoreLines, "/.siyuan/conf.json") // 忽略旧版同步配置
-	ret, err = dejavu.NewRepo(util.DataDir, util.RepoDir, util.HistoryDir, util.TempDir, Conf.Repo.Key, ignoreLines, cloudSiYuan)
+	ret, err = dejavu.NewRepo(util.DataDir, util.RepoDir, util.HistoryDir, util.TempDir, Conf.Repo.Key, ignoreLines, cloudRepo)
 	if nil != err {
 		logging.LogErrorf("init data repo failed: %s", err)
 	}