In the development process of digital design and construction technology, due to differences in information architecture, management levels and work modes, it is difficult to form a benign closed loop among construction parties in terms of undertaking the construction phase of 2D and 3D design results and the installation information in the operation and maintenance phase. This paper proposes to establish an integrated application system based on building digital design and intelligent construction to realize the whole industry chain integration from production endpoint to application endpoint. In the design stage, digital standard design is realized by establishing modern industrialized architectural design standards, component libraries and supporting tools. In the production stage, the direct conversion of digital results is realized through the research and development of construction methods and equipment matching the digital design results. The data management mode based on discretization is adopted.Under the standard data sharing, it adopts the method of layered independent management at each stage and inter-layer coding, takes into account the independence and interoperability of multiple platforms, and realizes the seamless implementation of the entire process of digital design results and digital integration of the industrial chain.