An evaluation system is a system configured to evaluate coverage of an evaluation target by using a captured image of the evaluation target. The evaluation system includes: an image acquisition unit configured to acquire the captured image; a correction unit configured to generate an evaluation image by correcting the captured image; an evaluation unit configured to evaluate the coverage based on the evaluation image; and an output unit configured to output a result of the evaluation carried out by the evaluation unit, wherein the correction unit extracts an evaluation region from the captured image based on the size of a dent region included in the captured image and generates the evaluation image based on the evaluation region, and the dent region is an image of a dent formed on the evaluation target.