A method for achieving interaction with a network hard disk device through a
wide area network and the network hard disk device are based on the
wide area internet formed by the network hard disk device, a
server and a network terminal device. According to the method, the network hard disk device
reports self connection
information data to the
server, when the network terminal device sends out a request for establishing
network communication connection with the network hard disk device to the
server, the server finds the connection
information data of the network hard disk device, the
network communication connection between the network terminal device and the network hard disk device is established according to the connection
information data of the network hard disk device, and therefore the network terminal device reads data from the network hard disk device through the
wide area internet and / or stores data into the network hard disk device. According to the method and the network hard disk device, the fact that the network terminal device accesses the network hard disk device in the wide area internet is achieved by means of the server, a user can access the network hard disk deice at any time in any place, and real private
data cloud storage space is established.