The invention discloses a power supply monitoring system for an electric power communication network. The power supply monitoring system comprises a plurality of communication sub-stations and sub-station database servers, wherein the communication sub-stations are used for obtaining real-time data of communication power supply devices, and the sub-station database servers correspond to the communication sub-stations respectively and are used for storing the real-time data. The power source monitoring system is characterized by further comprising a centralized control center station. The centralized control center station comprises a data conversion device, a center database server and a display operation device, wherein data conversion device is used for obtaining the real-time data from the sub-station database servers and converting the real-time data into data with the XML format, the center database server is used for storing the data with the XML format, and the display operation device is used for obtaining the data with the XML format and giving an alarm. The data of various communication power supply devices can be formatted, and various communication power supply devices are monitored on the same platform in a centralized mode.