The invention relates to a low-energy-consumption remote storage system and a design method thereof, in particular to a method of remote data storage by utilizing network communication, and a storage system, and belongs to the technical field of network communication and data storage. The remote storage system comprises a remote storage device and a remote access device, and has normal and standby work modes. The remote storage device comprises a storer, a storage resource manager, a normal access control and security management module, a standby access control and security management module, a normal remote communication module, a standby remote communication module and a standby management module, and the remote access device comprises a user interface, a remote storage resource manager, an access control and security module, and a remote communication module. In the period that the storer does not carry out an access operation, the storage device is in a low-power-consumption or power-off state, the energy consumption is effectively reduced; the end-to-end encryption can be performed, and the basic guarantee of the security of data resources of the user is provided.