Measurement method for actual measurement and laser radar

The invention discloses a measurement method for actual measurement and a laser radar. The measurement method comprises the following steps: setting a reflection mark at an elevation line of a wall body of a to-be-measured area; scanning the to-be-measured area through a laser radar to obtain three-dimensional point cloud data of the to-be-measured area, wherein the three-dimensional point cloud data comprises reflectivity; generating a room model of the to-be-detected area by using the three-dimensional point cloud data; and searching the position of the reflection mark in the room model according to the difference between the reflectivity of the reflection mark and the reflectivity of the wall body so as to obtain the position of the elevation line in the room model. Aiming at main dimension measurement requirements required by domestic actual measurement specifications, the method can replace a traditional low-efficiency measurement method, and meanwhile, measurement project management and data management are established, so that the overall operation efficiency is further improved, and the industry informatization degree is improved.