China's scientific and technological services disconnects real economy, which has become a bottleneck limiting the development of the industry. The technology service platform relying on large enterprises has become the representative of connecting and serving the real economy. Taking 761 C· Space, a subsidiary of Beijing Electronics Holding, as an example, studies the sustainable business model of technology transfer and incubation service centered on demand of industrial chain and innovation chain of large enterprises. In the context of deep integration of science and technology service and manufacturing industry, it provides a sustainable development model that can be used for reference and reproducible for those science and technology service player based on large enterprises.