A design and implementation method of smart home system architecture with the core of user demand. The system is based on the "cloud + end + lightweight host" smart Home model, which designed a series of protocol specification, smart devices support Zigbee, KNX, Lonworks protocol, UI dynamic loading and dynamic rendering, locale customization in each part of the cloud platform, smart host, APP smart home business. With the promotion of the market, the system has the advantages of wide applicability, simple use and so on.