An image processing device including a first control unit to control a normal operating mode during which image processing is performed, a second control unit to control an energy-saving mode during which power consumption is lower than during the normal operating mode, an interrupt request receiver connected to an external device to receive an interrupt request from the external device, interrupt factor distributors to distribute the interrupt request received by the interrupt request receiver based on whether or not the interrupt request includes a predetermined interrupt factor, interrupt request notification units to notify the second control unit as well as the first control unit of the interrupt request in accordance with distribution results from the interrupt factor distributors, and job adjustors to control transfer of a job between the first control unit and the second control unit based on notification from the interrupt request notification units.