A mobile communication method according to the present invention includes step of notifying an information transfer device 501 of identification information on a radio base station 201 by a network device 100, the information transfer device 501 corresponding to an inputted installation location of the radio base station 201, step of managing, by the information transfer device 501, the notified identification information on the radio base station 201, step of transmitting, when the radio base station 201 is installed or moved, an installation signal from the radio base station 201 to an information transfer device 501 to which the radio base station is connected, step of transferring the installation signal to the network device 100 by the information transfer device 501 to which the radio base station 201 is connected, if the information transfer device 501 manages the identification information on the radio base station 201 included in the received installation signal.