The air conditioner (10) consists of a refrigerating cycle formed between an outdoor unit (14) and an indoor unit (12) respectively installed at the outdoor and indoor of a room being air conditioned. A refrigerant is circulated through the refrigerating cycle and an air conditioning operation is performed using the electric power supplied from a mains power supply. An air conditioning part is provided in the indoor unit for performing an air conditioning operation to the interior of the room. An electric power is generated depending on the solar energy condensed by a system link electrical power generation device (150) such as a solar power generation device. The electric power generated by the electrical power generation device is output and adjusted in conjunction with the mains power supply.    An electricity generation controlled part (154) is provided for controlling the electric power generation device. An air conditioning control part (58) is provided inside the indoor unit for controlling the air conditioning part using a microcomputer (74). A serial connection circuit is provided to connect the electricity generation control part and the air conditioning control part for information exchange. A communication device such as a modem (132) is connected through a communication interface circuit (130) to the air conditioning control part for performing the transmission and reception of the operating information and the control information of the electric power generation device through a predetermined communication medium such as a personal computer connected from a remote place through a modem (136).    ADVANTAGE -   Facilitates display confirmation on operating condition of system link electric power generation device and set up of various settings through air conditioning unit. Facilitates easy connection and communication from remote places without requiring particularly installed special communication equipment. Facilitates performing exact operation of electric power generation device by controlling from remote places.