Green building is a building that saves resources (energy, land, water and forest) to the maximum extent, protects the environment and reduces pollution, provides people with healthy, applicable and efficient space, and harmoniously coexists with nature during the whole life cycle of the building (materials, building planning, design, construction, operation and maintenance).

Over the years, China's energy-saving green residential buildings have done a lot of work in promoting management concepts, preventing and alleviating the costs and risks of building energy-saving construction, and improving and ensuring the quality of buildings. They have conducted in-depth theoretical research and effective practical exploration, and achieved some useful theoretical results and successful practical experience.

Under the good situation of building energy conservation, the building energy conservation work has made remarkable achievements, but its overall energy conservation situation is worrying, for example, the energy situation in the construction stage of green building, the selection of energy-saving materials and the definition of energy-saving standards are worrying. Through the interpretation of the essence of green energy-saving buildings, this paper puts forward confusion and reflection, and looks for a better development route of green energy-saving buildings.

The innovation of this paper lies in the use of case analysis and charts to describe the problem more intuitively. And the related theoretical knowledge of star events is organically integrated and expounded.