The disclosure relates to a sensor network, machine type communication (MTC), machine-to-machine (M2M) communication, and technology for internet of things (IoT). A method of a server is provided. The method includes determining a target temperature range to be applied to a first zone; predicting an indoor temperature for each of a plurality of zones included in a second zone in which the first zone is included; predicting efficiency of at least one first outdoor unit connected to first indoor units installed at the second zone; and controlling operations of the first indoor units based on the target temperature range, the indoor temperature for each of the plurality of zones, and the efficiency of at least one first outdoor unit.