An image processor, having a control panel with a display function and performing device operation and external access using the control panel, includes a control panel operating status judgment unit which judges whether the operating status of the control panel is a device operation status or an external access status, an abnormality detection unit which detects the abnormality of the device, a reporting mode select unit which selects a reporting mode of a device abnormality when the device abnormality is detected by the abnormality detection unit, according to the operating status of the control panel judged by the control panel operating status judgment unit and the type of device abnormality detected by the abnormality detection unit, and a reporting unit which reports the device abnormality detected by the abnormality detection unit in the reporting mode selected by the reporting mode select unit.