diff --git a/kernel/api/router.go b/kernel/api/router.go
index 379fd3027..7b3effde4 100644
--- a/kernel/api/router.go
+++ b/kernel/api/router.go
@@ -184,6 +184,9 @@ func ServeAPI(ginServer *gin.Engine) {
 	ginServer.Handle("POST", "/api/sync/setSyncEnable", model.CheckAuth, setSyncEnable)
 	ginServer.Handle("POST", "/api/sync/setSyncGenerateConflictDoc", model.CheckAuth, setSyncGenerateConflictDoc)
 	ginServer.Handle("POST", "/api/sync/setSyncMode", model.CheckAuth, setSyncMode)
+	ginServer.Handle("POST", "/api/sync/setSyncProvider", model.CheckAuth, setSyncProvider)
+	ginServer.Handle("POST", "/api/sync/setSyncProviderS3", model.CheckAuth, setSyncProviderS3)
+	ginServer.Handle("POST", "/api/sync/setSyncProviderWebDAV", model.CheckAuth, setSyncProviderWebDAV)
 	ginServer.Handle("POST", "/api/sync/setCloudSyncDir", model.CheckAuth, setCloudSyncDir)
 	ginServer.Handle("POST", "/api/sync/createCloudSyncDir", model.CheckAuth, model.CheckReadonly, createCloudSyncDir)
 	ginServer.Handle("POST", "/api/sync/removeCloudSyncDir", model.CheckAuth, model.CheckReadonly, removeCloudSyncDir)
diff --git a/kernel/api/sync.go b/kernel/api/sync.go
index 81a27fbca..1e3a644fd 100644
--- a/kernel/api/sync.go
+++ b/kernel/api/sync.go
@@ -21,6 +21,7 @@ import (
 
 	"github.com/88250/gulu"
 	"github.com/gin-gonic/gin"
+	"github.com/siyuan-note/siyuan/kernel/conf"
 	"github.com/siyuan-note/siyuan/kernel/model"
 	"github.com/siyuan-note/siyuan/kernel/util"
 )
@@ -159,6 +160,95 @@ func setSyncMode(c *gin.Context) {
 	}
 }
 
+func setSyncProvider(c *gin.Context) {
+	ret := gulu.Ret.NewResult()
+	defer c.JSON(http.StatusOK, ret)
+
+	arg, ok := util.JsonArg(c, ret)
+	if !ok {
+		return
+	}
+
+	provider := int(arg["provider"].(float64))
+	err := model.SetSyncProvider(provider)
+	if nil != err {
+		ret.Code = 1
+		ret.Msg = err.Error()
+		ret.Data = map[string]interface{}{"closeTimeout": 5000}
+		return
+	}
+}
+
+func setSyncProviderS3(c *gin.Context) {
+	ret := gulu.Ret.NewResult()
+	defer c.JSON(http.StatusOK, ret)
+
+	arg, ok := util.JsonArg(c, ret)
+	if !ok {
+		return
+	}
+
+	s3Arg := arg["s3"].(interface{})
+	data, err := gulu.JSON.MarshalJSON(s3Arg)
+	if nil != err {
+		ret.Code = 1
+		ret.Msg = err.Error()
+		ret.Data = map[string]interface{}{"closeTimeout": 5000}
+		return
+	}
+
+	s3 := &conf.S3{}
+	if err = gulu.JSON.UnmarshalJSON(data, s3); nil != err {
+		ret.Code = 1
+		ret.Msg = err.Error()
+		ret.Data = map[string]interface{}{"closeTimeout": 5000}
+		return
+	}
+
+	err = model.SetSyncProviderS3(s3)
+	if nil != err {
+		ret.Code = 1
+		ret.Msg = err.Error()
+		ret.Data = map[string]interface{}{"closeTimeout": 5000}
+		return
+	}
+}
+
+func setSyncProviderWebDAV(c *gin.Context) {
+	ret := gulu.Ret.NewResult()
+	defer c.JSON(http.StatusOK, ret)
+
+	arg, ok := util.JsonArg(c, ret)
+	if !ok {
+		return
+	}
+
+	webdavArg := arg["webdav"].(interface{})
+	data, err := gulu.JSON.MarshalJSON(webdavArg)
+	if nil != err {
+		ret.Code = 1
+		ret.Msg = err.Error()
+		ret.Data = map[string]interface{}{"closeTimeout": 5000}
+		return
+	}
+
+	webdav := &conf.WebDAV{}
+	if err = gulu.JSON.UnmarshalJSON(data, webdav); nil != err {
+		ret.Code = 1
+		ret.Msg = err.Error()
+		ret.Data = map[string]interface{}{"closeTimeout": 5000}
+		return
+	}
+
+	err = model.SetSyncProviderWebDAV(webdav)
+	if nil != err {
+		ret.Code = 1
+		ret.Msg = err.Error()
+		ret.Data = map[string]interface{}{"closeTimeout": 5000}
+		return
+	}
+}
+
 func setCloudSyncDir(c *gin.Context) {
 	ret := gulu.Ret.NewResult()
 	defer c.JSON(http.StatusOK, ret)
diff --git a/kernel/model/sync.go b/kernel/model/sync.go
index 8a1ee28dd..520effc9e 100644
--- a/kernel/model/sync.go
+++ b/kernel/model/sync.go
@@ -301,6 +301,33 @@ func SetSyncMode(mode int) (err error) {
 	return
 }
 
+func SetSyncProvider(provider int) (err error) {
+	syncLock.Lock()
+	defer syncLock.Unlock()
+
+	Conf.Sync.Provider = provider
+	Conf.Save()
+	return
+}
+
+func SetSyncProviderS3(s3 *conf.S3) (err error) {
+	syncLock.Lock()
+	defer syncLock.Unlock()
+
+	Conf.Sync.S3 = s3
+	Conf.Save()
+	return
+}
+
+func SetSyncProviderWebDAV(webdav *conf.WebDAV) (err error) {
+	syncLock.Lock()
+	defer syncLock.Unlock()
+
+	Conf.Sync.WebDAV = webdav
+	Conf.Save()
+	return
+}
+
 var syncLock = sync.Mutex{}
 
 func CreateCloudSyncDir(name string) (err error) {