Abstract: The cooling system for a spacecraft environment simulation test requires a robust remote monitoring system to meet the demands of different facilities appropriately, and to perform the data monitoring and the facility control promptly and efficiently. By comparing and analyzing the common industrial field control networks, a PLC network based on Ethernet is chosen to build up the required system, complete with the design of its topography, and the frame of the monitoring and control system for its main loop and the user end. This scheme, while meeting the monitoring requirements, enhances the automation level of the remote monitoring for the cooling system.