To efficiently perform the channel management of a radio control model, to evade interference and to improve safety more.

Constitution is performed from the monitoring device 1 for management, the radio equipment 4 for maneuvering and the radio equipment 6 for the model, the radio equipment 4 for maneuvering discriminates the interference by recognition signals from the radio equipment 6 for the model and the radio equipment 6 for the model discriminates the interference by operation data from the radio equipment 4 for maneuvering. Then, at the time of judging that the interference is generated, the channel frequency of the radio equipment 4 for maneuvering is changed by free channel information from the radio equipment 1 for the management and the reception frequency of the radio equipment 6 for the model is changed as well by signals transmitted from the radio equipment 4 for maneuvering.