PURPOSE: To reduce a temperature difference in a room and improve the comfortable property as well as the efficiency of cooling and heating operations, by a method wherein the transmitter of a remote controller and the main body of an air-conditioner are provided with first and second temperature sensors and the tilting angle of an airflow direction control plate is controlled based on the difference between detected indoor temperatures.

CONSTITUTION: Indoor temperatures T1, T2 around the transmitter 5 of a remote controller and an indoor machine 6 are detected by first and second temperature sensors 7, 14. An infrared ray signal 11, corresponding to an indoor temperature T1, is transmitted to an infrared ray receiving circuit 12 while a temperature data pick-up circuit 13 outputs temperature data to a temperature difference operating circuit 16 based on the receiving signal of the infrared ray receiving circuit 12. The temperature data, corresponding to the indoor temperature T2 and detected by the second temperature sensor 14, is inputted into a temperature difference operating circuit 16. The temperature difference operating circuit 16 operates a temperature difference and outputs it to a control circuit 28. A tilting angle detecting circuit 24 detects the tilting angle of an airflow direction controlling plate 17 and outputs it to the control circuit 28. The control circuit 28 outputs a driving signal to a pulse oscillating circuit 26 and a stepping motor 25 changes the airflow direction controlling plate 17 so that a tilted angle coincides with the data thereof.