A surveying method for detecting an abnormal part of a target object by using a surveying apparatus that has a combined structure of a total station and a laser scanner, relationships of exterior orientation parameters between the total station and the laser scanner being known in advance, the total station comprising a telescope and a laser positioning unit adapted to emit a positioning laser light, the surveying method comprising: a step of acquiring first point cloud data and second point cloud data that are obtained by laser scanning, the laser scanning being performed on the target object multiple times at a time interval by the laser scanner; wherein the laser scanning is performed by emitting the positioning laser light while making the positioning laser light sweep, a step of calculating a difference in position information between the first point cloud data and the second point cloud data to detect a part of the target object, at which the position information varies between a time the first point cloud data is obtained and a time the second point cloud data is obtained, as a detailed-inspection target part; a step of acquiring a position of the detailed-inspection target part; the method being characterized by: a step of performing control for sighting, to make the telescope sight the detailed-inspection target part, on a basis of the position of the detailed-inspection target part, the total station performs positioning on matrix points at the detailed-inspection target part in such a manner that: positioning is performed by emitting the positioning laser light to one of the matrix points, multiple times; an average of results of the positioning that is performed multiple times is used as positioning data; and the positioning is repeated until all of the matrix points are positioned, whereby multiple pieces of the positioning data are obtained, and the multiple pieces of the positioning data are analyzed to determine the condition of an abnormality. the surveying method comprising: a step of acquiring first point cloud data and second point cloud data that are obtained by laser scanning, the laser scanning being performed on the target object multiple times at a time interval by the laser scanner; wherein the laser scanning is performed by emitting the positioning laser light while making the positioning laser light sweep, a step of calculating a difference in position information between the first point cloud data and the second point cloud data to detect a part of the target object, at which the position information varies between a time the first point cloud data is obtained and a time the second point cloud data is obtained, as a detailed-inspection target part; a step of acquiring a position of the detailed-inspection target part; a step of acquiring first point cloud data and second point cloud data that are obtained by laser scanning, the laser scanning being performed on the target object multiple times at a time interval by the laser scanner; wherein the laser scanning is performed by emitting the positioning laser light while making the positioning laser light sweep, a step of calculating a difference in position information between the first point cloud data and the second point cloud data to detect a part of the target object, at which the position information varies between a time the first point cloud data is obtained and a time the second point cloud data is obtained, as a detailed-inspection target part; a step of acquiring a position of the detailed-inspection target part; the method being characterized by: a step of performing control for sighting, to make the telescope sight the detailed-inspection target part, on a basis of the position of the detailed-inspection target part, the total station performs positioning on matrix points at the detailed-inspection target part in such a manner that: positioning is performed by emitting the positioning laser light to one of the matrix points, multiple times; an average of results of the positioning that is performed multiple times is used as positioning data; and the positioning is repeated until all of the matrix points are positioned, whereby multiple pieces of the positioning data are obtained, and the multiple pieces of the positioning data are analyzed to determine the condition of an abnormality. a step of performing control for sighting, to make the telescope sight the detailed-inspection target part, on a basis of the position of the detailed-inspection target part, the total station performs positioning on matrix points at the detailed-inspection target part in such a manner that: positioning is performed by emitting the positioning laser light to one of the matrix points, multiple times; an average of results of the positioning that is performed multiple times is used as positioning data; and the positioning is repeated until all of the matrix points are positioned, whereby multiple pieces of the positioning data are obtained, and the multiple pieces of the positioning data are analyzed to determine the condition of an abnormality. positioning is performed by emitting the positioning laser light to one of the matrix points, multiple times; an average of results of the positioning that is performed multiple times is used as positioning data; and the positioning is repeated until all of the matrix points are positioned, whereby multiple pieces of the positioning data are obtained, and the multiple pieces of the positioning data are analyzed to determine the condition of an abnormality.