Provided is a voice gateway, which in communication with at least one mobile terminal. The voice gateway includes: a terminal connection module configured to establish communication with the mobile terminal; a processor connected with the terminal connection module and configured to process a voice or data service request initiated by the mobile terminal; and a communication module connected with the processor and configured to communicate, according to the voice or data service request, with an external network. The mobile terminal can select a number from the voice gateway as the number to initiate the voice or data service request, and the voice gateway establishes, according to the voice or data service request, voice or data communication with a called party or an external network. Therefore, the mobile terminal can carry out voice or data service communication not only with a local number, but also through the voice gateway.