To provide a laser surveying system capable of determining from which target a reflected beam comes, which is reflected one of targets mounted on a plurality of subjects for measuring level displacement.

A laser surveying system includes a plurality of targets 52 each having a reflecting member for detection of position information and reflecting a laser beam projected; and a main body part having a light scanning part 14 projecting and scanning the laser beams, a light receiving part 15 receiving the laser beams projected from the light scanning part 14 and reflected by the targets 52, and a measuring part 19 obtaining information about the positions of the plural targets 52 from the laser beams received. In this case, the main body part has a target identifying part 18 which identifies each of the plural targets 52.