To provide a building air-conditioning remote control system which enables a supervisor who watches air-conditioning facilities 14 to notice trouble disturbing the supervision of the air-conditioning facilities 14 such as a transmission defect early in such a case.

The building air-conditioning remote control system is equipped with a server computer 50 and monitor computers 61 and 62. The server computer 50 gathers state data from the air-conditioning facilities 14 and stores the state data. The monitor computers 61 and 62 are connected to the server computer 50 and execute specified monitor programs to receive data regarding the state of the air-conditioning facilities 14 from the server computer 50.