When, in an administering device, there has been an evaluation that a user is authorized to enter into any given controlled region, the occupant counts of a movement origin controlled region and of a movement destination controlled region are updated by an occupant count updating portion and stored in a storing portion, where the occupancy statuses specified by the individual occupant counts in the storing portion are reported to an air-conditioning controlling device. In the air-conditioning controlling device, electricity-saving control parameters corresponding to the applicable occupancy statuses are obtained from an electricity-saving control information storing portion by an air-conditioning controlling portion in response to occupancy statuses reported by the administering device, to cause air-conditioning equipment, corresponding to the applicable region, to perform electricity-saving operation based on the electricity-saving control parameters.