Cloud storage system based on network gateway devices and network access method thereof

The invention discloses a cloud storage system which comprises a plurality of local network gateway devices used as supernodes, all the gateway devices are connected through internet and are always on line and connected with a plurality of user terminals in a local network. The invention also discloses a network access method based on the cloud storage system, comprising the steps of: requesting network resources by the user terminals in the local network through network query; and if requested integral network resources do not exist in the local network, requesting network resources outside the local network by the user terminals through supernodes. The local network gateway devices are configured into the supernodes, the user terminals in the local network are merged and agented for downloading the network resources, which avoids a large number of redundant flow caused by repeatedly downloading the same external network resources by users in the local network and improves the effective utilization rate of a