Intelligent substation is an important part of the intelligent power grid, while the integrated monitoring system is the basis for dispatching control and production management in the intelligent power grid. The PRS-7000 monitoring system of CYG SUNRI meets the requirements of digital information of entire station, network-based communication platform and standard information sharing, and various functions have been realized, such as uniform access, storage and display of station information, operation monitoring, operation and control, comprehensive information analysis and intelligent alarm, operation management and auxiliary applications.