An air conditioning system comprising: an outdoor unit (B) including communication means; an indoor unit (Al, A2) including communication means; a control device ; an outdoor unit control section configured to communicate with the outdoor unit via a communication medium while existing independently of the outdoor unit (B); and an indoor unit control section configured to communicate with the indoor unit (Al, A2) via a communication medium while existing independently of the indoor unit (Al, A2), wherein the outdoor unit control section and the indoor unit control section are configured to bidirectionally communicate with each other, the outdoor unit control section being configured to acquire information on equipment provided in the outdoor unit (B) via the communication medium while outputting a control instruction to the equipment provided in the outdoor unit (B), and the indoor unit control section being configured to acquire information on equipment provided in the indoor unit (Al, A2) via the communication medium while outputting a control instruction to the equipment provided in the indoor unit (Al, A2), the air conditioning system being configured so that the outdoor unit control section and the indoor unit control section are respectively implemented as virtualized control sections onto the control device , wherein the control device includes a master control section , the master control section being configured to acquire attribute information on the indoor unit (Al, A2) and the outdoor unit (B) connected to the communication medium at the time of startup, and the air conditioning system being configured so that the virtualized indoor unit control section and the virtualized outdoor unit control section are respectively created based on the attribute information. an outdoor unit (B) including communication means; an indoor unit (Al, A2) including communication means; a control device ; an outdoor unit control section configured to communicate with the outdoor unit via a communication medium while existing independently of the outdoor unit (B); and an indoor unit control section configured to communicate with the indoor unit (Al, A2) via a communication medium while existing independently of the indoor unit (Al, A2), wherein the outdoor unit control section and the indoor unit control section are configured to bidirectionally communicate with each other, the outdoor unit control section being configured to acquire information on equipment provided in the outdoor unit (B) via the communication medium while outputting a control instruction to the equipment provided in the outdoor unit (B), and the indoor unit control section being configured to acquire information on equipment provided in the indoor unit (Al, A2) via the communication medium while outputting a control instruction to the equipment provided in the indoor unit (Al, A2), the air conditioning system being configured so that the outdoor unit control section and the indoor unit control section are respectively implemented as virtualized control sections onto the control device , wherein the control device includes a master control section , the master control section being configured to acquire attribute information on the indoor unit (Al, A2) and the outdoor unit (B) connected to the communication medium at the time of startup, and the air conditioning system being configured so that the virtualized indoor unit control section and the virtualized outdoor unit control section are respectively created based on the attribute information. <EOS>