A wireless communication system includes a plurality of base stations and a management server. Each base station includes: a carrier sensing unit which performs carrier sensing for other base stations; a list generating unit which generates a monitor list including a difference in frame timing between the base station and each other base station; and a base station transmitter which transmits the monitor list. The management server includes: a management receiver which receives the monitor lists; a calculation unit which calculates a shift amount by which the frame timing of a target base station is to be shifted, based on the monitor lists; and a shift instructing unit which instructs to shift the frame timing of the target base station by the shift amount if the differences in frame timing among the base stations when reflecting the shift amount is improved from those before reflecting the shift amount.