Energy-saving Technical Measures of German Low-energy Buildings

German building energy-saving technology holds a leading position in the world. This paper studies German low-energy buildings in aspects of the wall, thermal insulation, the window, new energy application, natural ventilation and controllable sun-shading, looking forward to provide certain reference for China's building energy conservation. In 2008, Germany officially launched the second generation of low-energy building evaluation system - DGNB([1]). This system overall controls building energy consumption in the following aspects: building material production and construction, building maintenance in the application period, recycle and demolition. This paper will introduce German experience in the above aspects, in hope of gaining certain reference.