Based on windows, Building Energy Monitoring & Controls System2.0 is a comprehensive building energy consumption analysis and control management system. It is also a energy-saving management system aiming at energy managing and saving. Monitor energy consumption equipment, collect, display and alarm the relative parameter of the operation and efficiency. Provide qualitative and quantitative analysis and report to client for adjusting operation strategy. Analyze the data collected to optimize the energy consumption management. Therefore, properly use the energy to save it and achieve optimized management of energy consumption.