Energy consumption monitoring system is a general designation of hardware and software systems that can realize on-line monitoring and dynamic sub item function of energy consumption of public buildings by installing classified and sub item energy consumption metering devices and collecting energy consumption data in real time by means of remote transmission. The whole system realizes automatic data collection, real-time dynamic monitoring, fault alarm, statistics and comprehensive analysis of various energy sources in the building. At the same time, it helps users mine effective data, help users find energy problems from the daily energy consumption link itself, establish a perfect energy source management process, carry out digital and fine management of energy consumption, and reduce energy management links Improve operation and management efficiency and reduce energy waste and expenditure.