The invention discloses an electric power automation communication monitor system comprising a power module, an input module, an A/D convertor, a single chip microcomputer, an I/O device and a fault output module. The power module supplies power for the system. An uplink and a downlink signal are input by the input module. The A/D convertor is connected with the input module. The input end of the single chip microcomputer is connected with the output end of the A/D convertor, and the output end of the single chip microcomputer is connected with the fault output module. The I/O device is connected with the single chip microcomputer through a bus. By means of the electric power automation communication monitor system, the operation conditions of an uplink and a downlink can be monitored in real time, the fault information of the links is judged, and the relevant fault information is timely fed back to corresponding technical personnel.