To enable an air-conditioning system, provided with a plurality of indoor machines for air-conditioning one room and a remote controller, which controls the operations of the indoor machines, to quickly eliminate non-uniform temperature distribution in the room, even if a user of the system does not make the troublesome of setting operation, when the system is operated for air conditioning.

The remote controller 3 separately and automatically controls the indoor machines 1 and 2, based on the information on the temperature distribution in the room obtained from indoor temperatures detected, by means of temperature sensors 5 and 6 which are respectively installed to the indoor machines 1 and 2, a set indoor temperature set by the user, and prestored information on the positional relation between the indoor machines 1 and 2.