In order to provide a new service even to a conventional mobile communication terminal without installing a new function when starting a new mobile communication service, a mobile communication terminal includes a virtual terminal server that controls the communication on behalf of the mobile communication terminal according to a request from the mobile communication terminal to realize a service function that is a communication function not included in the mobile communication terminal. The virtual terminal server processes, in accordance with the model information of the mobile communication function, information to be informed to the mobile communication terminal to realize the service function to thereby enable the mobile communication terminal to acquire and transmit information obtained by realizing the service function.