AIR-CONDITIONING CONTROL SYSTEM AND CONTROL METHOD FOR AIR-CONDITIONING CONTROL APPARATUS

An air-conditioning control system includes: a weather information providing system and an air-conditioning control apparatus that controls an air conditioner installed in a vehicle. The air-conditioning control apparatus includes: a receiving unit that receives, from the weather information providing system, first weather information indicating an estimated weather condition predicted at the vehicle; a measurement unit that performs measurements concerning second weather information indicating an actual weather condition at the position of the vehicle; a judgment unit that judges whether or not a reliability level of the first weather information is below a first threshold value by comparing the first weather information and the second weather information or by detecting a change per unit time of the second weather information; and a transmission unit that transmits, to the weather information providing system.