To provide a mobile communication system capable of selecting a base station able to provide a service.

The mobile communication terminal includes: a service class reception section (S501) for receiving a base station number and service classes being providable from base stations from all base stations of enabling communication; a base station storage section (S502) for storing a received base station number and service classes by each base station; a base station providing service display section (S503) for displaying the stored service class by each base station, a base station selection section (S504) for accepting the selection of any base station from displayed base stations, and a position registration request transmission section (S505) for transmitting a position registration request of its own terminal to the selected base station.