To reduce operation load of a user in an attendance management function.

An attendance information management system utilizes a personal authentication function in an image processing device 1. The attendance information management system includes an attendance information processing part, which associates personal identification information for identifying a person authenticated in the image processing device 1 and information of time when a punching operation is performed in the image processing device 1 with each other, and saves it as punching information, which determines an abnormal attendance of a person identified by the personal identification information on the basis of the saved punching information, which corrects the determination result of the abnormal attendance on the basis of information related to a schedule of a person identified by the personal identification information, and which generates attendance information indicating an attendance state of a person identified by the personal identification information on the basis of the punching information and the determination result of the abnormal attendance, and stores it in a recording medium.