The invention provides an intelligent monitoring system used for electric power system fire alarm. An upper and lower computer network structure design of an upper host and lower computer DSP controllers is adopted based on a TMS320F type DSP chip and CAN bus technology. Two types of sensors of temperature sensors and smog sensors are adopted to acquire field real-time data information. High-speed and accurate processing of data is completed by adopting multiple DSP controllers, and start and stop of multiple alarm devices and water spraying and fire extinguishing devices are controlled. A CAN communication module is connected with the upper host and multiple DSP controller by introducing the communication mode of the CAN bus technology so that high-efficiency transmission of the data and human-computer interaction can be realized. According to the system, fire of an electric power system or potential fire causing factors can be timely discovered, the fire risk is timely prompted to relevant personnel and effective measures are timely taken further and fire is stopped in the bud so that safe and stable operation of the electric power system can be guaranteed.