The LEED(Leader in Energy and Environmental Design)evaluation system was launched by the Green Building Council of the United States in 1998 to promote green building design and improve the environmental friendliness of building projects.The system has been applied in more than 100 countries around the world,covering all kinds of buildings.In China,LEED plays an important role in improving building sustainability.Through strict scoring system and certification level,it improves resource utilization efficiency and indoor environmental quality,and promotes ecological protection and social and economic benefits.