In view of the problems of low accuracy and efficiency of the traditional surveying and mapping methods in topographic map surveying and mapping, a new surveying and mapping mode combining a new generation of digital elevation model (DEM) with oblique images is proposed. In this mode, the UAV is used to carry a tilt camera for aerial survey to obtain data, and then the DEM is generated through computer processing, and then it is imported to the Arcgis platform to build three-dimensional graphics and implement visual editing of the model； At the same time, the GIS system software is used to realize the functions of data sharing, query statistical analysis and other functions, so as to achieve the goal of quickly and efficiently completing the land use planning and design and related achievements management. Experiments show that the proposed method can effectively solve the problems of large data errors caused by improper human operation in the traditional surveying and mapping process, as well as data processing difficulties caused by large amounts of data. In addition, due to the use of UAV tilt photography technology to collect data， not only the work efficiency is greatly improved, but also the cost input is reduced, which has strong promotion and application prospects and broad market prospects.