The online monitoring system for distribution substations comprehensively detects the status of distribution substations. Inspectors can either not go to the site or reduce the frequency of on-site inspections. Through the equipment status data collected by the platform, they can comprehensively grasp the operation situation of distribution substations, thereby reducing the cost of manual inspections and improving safety guarantees. It also prevents human errors such as missed or incorrect inspections, improving the quality and consistency of operation and maintenance. Finally, through comprehensive monitoring of distribution substations, the system enables early fault prediction and the correct measures to quickly isolate issues, addressing the safe operation of power systems through prediction, detection, and repair.