A control device includes a main control unit that serves as a main component for device control and to which power is supplied from a first power unit; a power control unit that controls the first power unit and to which power is supplied from a second power unit; a memory control unit that accesses a memory that stores therein a computer program and data and to which power is supplied from the second power unit; and a network control unit that receives packets through a network and transfers the packets to the memory through the memory control unit and to which power is supplied from the second power unit.