Air-conditioner's control system using telephone network and its operating method

The present invention is connected to the telephone network from a remote location using a telephone network can be newly registered setting information of the plurality of air conditioners by using a control program running on a remote electronic device that can input a control command into a plurality of air conditioning of a building It relates to air conditioning control system and its operation method, a plurality of possible transmission and reception of signals over a telephone network and air conditioning; In accordance with the new registration at the same time, adapted to include a remote electronic device that is a control program is driven to enter a control command to some or all of the plurality of air-conditioning the registered for by inputting the set information of the plurality of air-conditioning, user control Entering a command has a separate input can be easily remotely controlled as required by referring to the setting information about the air-conditioning control so that the command is automatically sent.