This article explores and analyzes the significance of green building design and states new concept of green building design. In order to establish the concept to realize sustainable development of green building, this article introduces the concept and characteristics of green building, states the meaning of green building development from many aspects and puts forward the strategy to develop green building economy and green building materials. Modern civilization brings people the convenience and comfort. Meanwhile, we also gradually realize the isolation brought by buildings for human and nature and its damage and influence on the environment. In order to let buildings back to nature and close to nature to realize coexistence of buildings and nature, experts and scholars put forward the concept of "green building". Green buildings refer to buildings to provide people with comfortable, healthy and safe living space, make use of resources with high efficiency in life cycle of buildings and minimally influence the environment. It is also called ecological building and sustainable building.