Abstract: A radio telephone system which is suitable when the number of radio telephone sets is relatively small, communication traffic is low, and the system must cover a wide communication area, and a method of controlling the system is disclosed. In the system, a plurality of base stations commonly connected to a wired line and at least one radio telephone set are provided and the position registration of the radio telephone set is carried out with respect to either one of the base stations so that when the system receives an incoming call from the wired line, a radio speech circuit is established between the position-registration base station and the radio telephone set. The position registration can be realized by depressing a particular key provided to the radio telephone set or by operating a keyboard or the like provided to a particular one of the base stations.