Assembly building is a new type of sustainable building production mode. Its mode is prefabricated production (including prefabricated concrete structures, modern wood structures, etc.) in component factories, and on-site assembly-based installation. It is characterized by standardized design, factory production, prefabricated construction, integrated decoration and information management and integrates various business fields such as R&D design, production and manufacturing, on-site assembly to achieve energy conservation, environmental protection and maximization of full cycle value of building products.