Three-dimensional model construction method and device

The invention provides a three-dimensional model construction method and device, and solves the problems of tedious work and low efficiency of manual configuration of spatial point locations in a three-dimensional space. The three-dimensional model construction method comprises the steps that outdoor position information of first objects in a three-dimensional space is obtained based on the mapping relation between longitude and latitude data of a geographic information system and coordinate data in the three-dimensional space, and the first objects comprise buildings; acquiring a preset building reference map corresponding to the building, and acquiring indoor position information of each second object in the building relative to the building based on the preset building reference map; obtaining object position information of each second object in the three-dimensional space based on the outdoor position information of each first object in the three-dimensional space and the indoor position information of ea