PURPOSE: To enhance performance in temperature adjustment response immediately after the start of operation in the captioned temperature control, in which correction is made based on sunshine rate, by constituting an air conditioner in such a manner that, within the preset time after the start of operation, the temperature is controlled by using predetermined sunshine rate for correction regardless of true sunshine rate.

CONSTITUTION: Within preset operation time tC1 after the start of operation of an air conditioner, signals on the atmospheric temperature 15, room temperature 16, preset temperature, etc., which are input into a microcomputer 21 via an input interface 22, undergo correcting-operation-processing based on predetermined sunshine rate Q1 regardless of the data from a sunshine rate sensor 14 to regulate actuators 26W30, and a compressor, etc. for control over air conditioning. After the preset time tC1 has elapsed, mean sunshine rate is computed based on the data from the sensor 14 as usual for the said control. With this constitution, performance in temperature adjustment response immediately after the start of operation can be enhanced.