In order to improve the reliability of underground power substation, based on low monitoring sensor technology and  comprehensive utilization monitoring data in core temperature monitoring system of power substation, acoustic surface temperature detection technology applied in substation core temperature monitoring was put forward, touch of the switch, disconnected switch, GIS the temperature of the core equipment information, monitoring data management platform were designed, various sensor and system of the upper data management platform of the standardized interface met the needs of detection system of the underlying, which realized unified management and comprehensive utilization of data.