The invention provides an automatic master station network monitoring system. The system is characterized in that a data acquisition module carries out real-time acquisition of automatic system information, master station equipment running statuses and secondary security equipment running statuses, and sends the acquired data to an equipment information real-time database of an automatic system modeling and online monitoring module and a big data analysis platform through a message bus for controlling an automatic system; the automatic system modeling and online monitoring module carries out equipment status information monitoring, failure early warning, analysis, warning and other processing procedures of the acquired data, and stores processed data to a historical database; an automatic master station network health evaluation system is established to manage equipment defects; and during automatic master station network health status evaluation, the health status of equipment is comprehensively evaluated according to the running status of the equipment and in combination with historical information. The system provided by the invention has the advantages that real-time monitoring and abnormal status early warning functions are achieved, so that the response and processing capabilities for abnormal events and the operation and maintenance management level are improved.