Indoor area field investigation method of laser radar

The invention relates to the technical field of laser radar ranging, and particularly discloses an indoor area field investigation method of a laser radar, which comprises the following steps: S1, scanning along an indoor wall environment through a laser radar scanning system, acquiring indoor target data and an image, and splicing the indoor target data and the image to form an indoor three-dimensional image, displaying indoor three-dimensional diagram acquisition size data; s2, scanning the surface of the indoor fixed furniture while scanning along the indoor wall environment to form a three-dimensional diagram of the fixed furniture, and collecting the size of the fixed furniture; s3, converting the indoor three-dimensional diagram and the fixed furniture three-dimensional diagram into projection drawings, and marking size data to form a house type projection drawing; s4, obtaining the actual available area S of the house type; s5, the house type projection drawing, the size data and the actual available a