A mobile communication method according to the present invention includes step of causing a mobile station 300 standing by in a cell under a control of a radio base station 202 to send identification information of the mobile station and special identification information; step of, upon receipt of the special identification information, determining whether or not the mobile station 300 has access permission to a radio base station 200 based on the received identification information of the mobile station 300 and identification information of a second radio base station; and step of, when it is determined that the mobile station 300 has access authorization to the radio base station 200, instructing the mobile station 300 to change a radio communication parameter used by the mobile station 300.