In sum, based on the smart home, Haier has established a platform network of mutual connection and support. Among them are the Shunguang social platform, which functions as the user contact end, the COSMOPlat platform, which enables products, services and solutions to be implemented quickly, and the U^+platform, which gathers more developers and resources. The case study of this paper is mainly about how Haier’s digital twin platform network, based on these three major platforms, can help enterprises to innovate the sustainable business model.