Abstract: Considering the practices of well-known enterprises at home and abroad in HEMS(Home Energy Management System)

BEMS(Building Energy Management System) and E2MS(Enterprise Energy Management System)

the concept of U-EMS(User-Energy Management System) is designed in this paper. Firstly

the key feature of U-EMS is studied; secondly

specific grid structure of three kinds of U-EMSs is given; thirdly

the latest development of U-EMS is introduced; at last

problems need to be solved is expounded in recent practice development and long-term development.