An electrical fire monitoring system comprises a power unit, a switch power supply, a central processing unit, a two-bus interface unit, a CAN bus interface unit, an RS485 interface unit, an Ethernet interface unit, a relay control output interface unit, a switch quantity input interface unit, a liquid crystal display unit, a USB interface unit, a keyboard unit, an alarm indicator lamp output unit, a buzzer output unit, a printer output unit, a monitoring detector, a fire control room graphic display device, a cloud server; the electrical fire monitoring system provided by the present invention has a rich display interface, and the central processing unit can automatically scan the address of the monitoring detector to realize the automatic setting of the monitoring detector address, and at the same time, it adds multiple communication interfaces on the basis of the traditional electrical fire monitoring system, and can be used with different communication interfaces. The monitoring detector is effectively connected, making the entire system more user-friendly and greatly reducing the workload of on-site construction personnel.