An image capturing apparatus sets reference values for a plurality of evaluation indexes and captures images of affected regions for the evaluation indexes, based on user's operation. An image processing apparatus analyzes the captured images and determines the affected region(s) for the evaluation index(es) exceeding the associated reference value(s) set by the user. The image capturing apparatus causes a display unit to highlight the affected region(s) for the evaluation index(es) exceeding the associated reference value(s) and superposes (displays) the affected region(s) on the image of an affected region.