With the continuous advancement of the construction of 3D real scenes in China, urban-level 3D real scenes have been built in various parts of the country, and integrated applications have been carried out in various industries. To better support economic and social development and assist in the construction of a digital government and digital China, it is necessary to update the urban-level 3D real scenes to ensure their timeliness. In this paper, we focus on the characteristics of the tile-based modeling of urban-level 3D real-scene data, using data from daily urban surveying and dynamic monitoring using unmanned aerial vehicles to quickly obtain a tilted mesh model. By unifying the coordinate origin and grid size, we can regularly update the urban-level 3D real scene data, forming a mechanism for the regular update of urban-level 3D real scene data. It has been comprehensively applied in the maintenance and update of the urban-level 3D real scenes in Wuhan, solving the problems of low efficiency, high cost, large color difference, and poor effect at the update range of urban-level 3D real scene data.