With the increasing demand of users for residential quality, system doors and windows are increasingly concerned by users. Domestic research institutions engaged in system doors and windows have sprung up, and system doors and windows products have gradually opened up in the market. Real estate developers who pursue quality have also begun to incorporate system doors and windows into the procurement system. The system doors and windows products in the market are also mixed. System doors and windows are a complex system, from raw materials to products to end users, we consider using a series of reports to explain our understanding of the development of system doors and windows. We hope to act as a bridge between supply and demand in the market, help the demand side (real estate developers) to better choose qualified system doors and windows products, and also provide reference and discussion for relevant people in the industry.