Name: Double-skinned Energy-saving Curtain Wall Project: According to ventilation theory, there are natural ventilation system and forced ventilation system. As for structure, it is composed of outer single glass curtain wall, ventilation equipment, overshadow installation and inner double-galzing thermal insulated curtain wall. In summer, sun irradiation makes air high temperature between inner and outer curtain wall. With natural convection and chimney effect, fresh and cool air will be drawn in to replace the exhaust air inside the building. In winter, the ventilation intake will be closed and the air between double curtain wall then become warm under the sun irradiation. Thus,give the energy-saving and environment protection effect.