An automatic position adjustment system of the present disclosure includes a position detection unit configured to measure the position of an installation target object installed on a table as viewed from a reference position as a reference installation point, a control device configured to calculate a displacement between the position of the installation target object obtained by the position detection unit and viewed from the reference position and a proper target position in installation of the installation target object as viewed from the reference position, and a position adjustment unit configured to correct the position of the installation target object to the target position based on the calculated displacement.