AIR-CONDITIONING SYSTEM

An air-conditioning system (1) executes a first operation in accordance with a reduction command to reduce commercial power consumption in the entire system, the first operation allowing a utilization-side heat exchanger (41) to perform air conditioning using a thermal storage heat exchanger (21) as a heat source. The air-conditioning system (1) includes a power reduction section (5, 11, 100) performing a first control in synchronization with a timing of the start of the first operation, the first control making the commercial power consumption in the entire system equal to or lower than a first value.