Abstract: A company has realized the remote centralized monitoring and management of one 110kV substation, four 6kV cement mill substations, and one waste heat power station through the upgrading and transformation of the substation automation control system. Through the application of power monitoring and control, access control management, video monitoring, environmental monitoring and other systems, the intelligent unattended operation mode of the substation is realized, which can maximize the potential of the existing power supply system, save operation costs, and improve the safe operation level of the power system.