A radio communication system able to determine the position of each mobile terminal, able to deliver exact information, and able to precisely centrally manage the entire system, including mobile phones wirelessly transmitting image information obtained in image capturing portions and acquired locating information when receiving a request, and a management center including judging a position of each mobile phone based on the locating information transmitted from each mobile phone and storing the judged position information, and transmitting a request to the mobile phones and judging whether it received the locating information from all the mobile phones to which it transmitted the request, specifies any mobile phone from which it did not receive the locating information based on the position information of the database when it did not receive all the locating information, and transmits the latest position information of the identified mobile phone to the mobile phone located close to the identified mobile phone and makes a mobilization request.