Device for measuring internal and external right angles of building based on laser

The utility model relates to the technical field of measuring tools, and discloses a laser-based building internal and external right angle measuring device, which comprises a main body, the main body comprises a reference surface and a target reference surface, the reference surface is attached to the reference surface of a measured building, and the target reference surface abuts against the measuring surface of the measured building; the line laser transmitter is arranged on the main body and is used for transmitting line laser to the measuring surface of the measured building; the image collector is arranged on the main body and is used for acquiring the line laser irradiated on the measuring surface of the measured building; and the controller is arranged on the main body, and the controller receives the length of the line laser collected by the image collector and calculates an included angle between a target reference surface and a measurement surface of the measured building according to a preset form