1. A measurement method of measuring a shape of a measurement target surface having a circular contour, comprising: a first step of obtaining shape data by causing a stage which holds the measurement target surface to rotate the measurement target surface about a rotation axis, positioning each of a plurality of partial regions of the measurement target surface in a field of view of a measurement apparatus, and causing the measurement apparatus to measure each of the plurality of partial regions; a second step of obtaining, for each of a plurality of partial contour regions of the plurality of partial regions, which includes part of a contour of the measurement target surface, a central position of the measurement target surface using data of the contour included in the shape data; a third step of obtaining, based on the plurality of central positions obtained for the plurality of partial contour regions, a position of the rotation axis of the measurement target surface in positioning each of the plurality of partial regions; and a fourth step of obtaining the shape of the measurement target surface by concatenating the shape data of the plurality of partial regions using the position of the rotation axis obtained in the third step and a rotation angle of the measurement target surface by the stage in positioning each of the plurality of partial regions.