METHOD AND DEVICE FOR ACHIEVING DATA ROAMING

The present invention is applied to the field of computer network communications, and provided are a method and device for achieving data roaming. The method comprises: a client obtaining a data roaming voucher uniquely corresponding to user logon information; the client sending a data roaming request with the data roaming voucher to a data roaming server; and according to the data roaming voucher contained in the received data roaming request, the data roaming server verifying whether the data roaming request is valid, and transmitting roaming data between the client and the data roaming server if the data roaming request is valid. Before data communication is conducted between a client and a data roaming server, the step of verifying the validity of a user data roaming request is also required, and thus, the present invention can achieve the secure isolation of user information. In addition, the data roaming server uses a user network system structure in a catalogue form, thereby ensuring the file locating expandability and universality.