The invention provides a network monitoring method for an electricity utilization information acquisition system according to daily easily-generated network faults in the electricity utilization information acquisition system. The network monitoring method includes the steps: performing topology analysis on an overall network architecture of the electricity utilization information acquisition system, and building topology graphs of all devices such as electricity utilization information acquisition master station servers, network devices and communication preprocessors; monitoring terminals in network topology graphs by the aid of network tools such as ping/tracert; monitoring running conditions of electricity utilization acquisition terminals of on-site operation by the aid of modes such as regular heartbeat messages, sufficiently monitoring all corners of the electricity utilization information acquisition system, and rapidly positioning faults.