A product monitoring device is provided that presents, to the user, information by which the user can recognize specific work items of a product management work for improving an inappropriate display state. The product monitoring device acquires a captured image of a display area, sets a state monitoring area on the captured image of the display area, acquires product detection information indicating a position of a product in the state monitoring area, based on a captured image of the state monitoring area, evaluates a display state of the product in the state monitoring area, using a plurality of evaluation indices relating to display disorder of the product, based on the product detection information, and presents information on an evaluation result to a user.