Air-conditioning system and control device

An air-conditioning system comprising:

• a second control device that is communicable with a first control device, the first control device being configured to control a first system including a first air-conditioning device by first communication using a first communication protocol, the second control device being configured to control a second system including a second air-conditioning device by second communication using a second communication protocol different from the first communication protocol, wherein
• the second control device:
• is communicable with the first control device by third communication using a third communication protocol different from the first communication protocol and the second communication protocol,
• acquires first control information from the first control device by the third communication, the first control information being used for controlling the first system,
• creates second control information based on the first control information acquired by the third communication, the second control information causing the second system to execute control corresponding to control of the first system executed according to the first control information, and
• controls the second system by the second communication based on the created second control information.