There is disclosed a mobile robot including an image processor that generates recognition information regarding a target object included in a taken image, and a main controller integrally controlling the robot based on this recognition information. The image processor executes steps of: generating a low-resolution image and at least one high-resolution image whose resolution higher than that of the low-resolution image; generating first target object information regarding the target object from the low-resolution image; determining which high-resolution image should be processed if two or more high-resolution images are generated, and then defining a resolution process region in the low-resolution image; processing a region in the high-resolution region corresponding to the resolution process region in the low-resolution image, so as to generate second target object information in the high-resolution image; and determining whether or not the first and the second target object information are matched; and based on this determination, using at least either of the first and the second target object information, thereby to generate the recognition information.