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In order to solve the conventional electrical fire monitoring system in the long-distance data communication error rate, terminal nodes can be connected to a small number of bus transfer rate and low design electrical fire remote monitoring system based on CAN bus and STM32F103 microcontroller . Gives the overall framework of the system and its components, focusing on the hardware and software design ideas terminal fire monitoring equipment, has developed fire monitoring equipment and PC communication protocols. System to achieve the operating state fire linkage equipment, is the supply voltage monitoring devices, current, residual current value is to protect electrical equipment, and real-time monitoring of environmental temperature electrical equipment work and status will be monitored through the CAN bus real-time transmission to the remote computer. Fire monitoring in the realization of basic functions, increased by the fieldbus host function and site other monitoring equipment communications. Test results show that the system in long-distance data communications transmission rate increase, increased monitoring node, the data communication system between the error rate is very low.