the system is mainly used for on-line monitoring and control of sf6 gas in the gis equipment of the power industry and in the sf6 circuit breakers. it can perform real-time data acquisition and display, remote information transmission, fault alarm, blocking mechanism start, background data display and analysis of the moisture content, density and temperature of sf6 gas under the condition of no emission of sf6 gas, providing information and basis for power system production management and equipment condition maintenance.