The paper develops the national building and municipal facilities survey system through carrying out the first national natural disaster comprehensive risk census and secondary development in the national self built housing safety special renovation work. Thus the paper forms a development model based on census data, couples with supporting special work, and aims at Digital transformation. What's more, this paper also explores the construction of a data base of census data and industry data through data interconnection on existing platforms and data applications on three-level interconnection and multi-agent work portals. From all the work above, the paper proposes ideas for strengthening data applications, expanding platform scenarios, and creating collaborative platforms for digital housing construction.