Thermal control system is an important subsystem of FENGYUN meteorological satellites, which directly affects the work of the other subsystems and the satellite life. Therefore, long-term in-orbit monitoring, fault detection and fault diagnosis for the system have a major practical indicating significance. Based on detailed analysis of the principle, function and composition of FENGYUN meteorological satellites thermal control system, the paper makes a systematic study of its ground health management mechanism and technology, and designs corresponding comprehensive application platform. With telemetry data as input, the scenario of the failure is established, realized the monitoring and health management of the FY3D thermal control system, having the function of correlation analysis and visual expression of temperature fluctuation events caused by state changes of satellite platform and payloads. It can provide effective early warning and assistant guarantee for the satellite security, and has the value of popularization.