Featured by diverse formats, sources, platforms and mathematical bases, the land resources data belong to a typical heterogeneous data warehouse. It is very important to establish the organizational model for land and resources management and supervision of resources. After thoroughly analyzing the characteristics of land resources data, this paper puts forward the establishment of “One Map” organizational model for land resources data used in supervision and service in four principles, that is, “comprehensiveness, integrity, sharing, timeliness”. To analysis the characteristics of update and sharing relationship between the “One Map” database with Business Database, Monitoring Database and Index Database. Take Chengdu city as an example, we employ the ETL and data update management technology to construct the initial “One Map” database and realize its update management. In this way, the “One Map” comprehensive database is constructed with the full coverage of space, business and sector, which have covered more than two kinds and 51 items of land and resources data. In addition, they have covered 160 key elements, more than 90 million records and up to 3TB data. So as to provide the data support and information service for analysis and decision of land and resources management and supervision of resources.