To ensure the safety of high-voltage bus in substation,self-powered wireless temperature monitoring system for high voltage equipment was designed,the systerm of wireless temperature monitoring use temperature sensors to collect data,and Zigbee module to transmit data,the power supply mode based on TI company"s bq25504 energy harvesting chip to collect solar energy for wireless temperature measurement module, which guarantee long-term normal work of the systerm.thereby solving the issue of short battery lifetime cycle.