Aspects of the disclosure are directed to a method and device for synchronizing data, and a storage medium. The method can be applied to an intelligent home system, the intelligent home system including a primary gateway and a backup gateway. The method can include determining, in response to first stored data on the primary gateway being monitored to change, incremental data of changed first stored data relative to second stored data, the second stored data including currently stored data on the backup gateway, and sending the incremental data to the backup gateway for the backup gateway to synchronize the second stored data.