Surveying Instrument And Surveying System

Provided is a surveying instrument including a surveying instrument main body, in which the surveying instrument main body includes a distance measuring module configured to project the distance measuring light toward an object and to perform the distance measurement, an optical axis deflector configured to at least uniaxially perform a scan using the distance measuring light, a storage module configured to store a two-dimensional map, and an arithmetic control module, and the arithmetic control module is configured to compare two-dimensional coordinates excluding a height in three-dimensional coordinates of each point acquired along a locus of the distance measuring light with the positional information of the measuring point in said two-dimensional map, and select a point which is in a range of a threshold value set in advance from the positional information of the measuring point in the two-dimensional map as the measuring point.