A control device includes a calculating unit and a specifying unit. The calculating unit calculates an estimated interference area of a base station to be installed for a secondary system, based on an installation scheduled position of the base station to be installed, an installation position of a reference base station of the secondary system, and an actually-measured interference area of the reference base station. The specifying unit specifies a channel of a primary system for which a used area does not overlap with the calculated estimated interference area.