A control device of an industrial machine having a mechanism driven by a hydraulic actuator, the control device comprising: a first hydraulic pump for supplying hydraulic oil for actuating the hydraulic actuator; a first pump drive device for driving the first hydraulic pump; a control valve for receiving pilot pressure and performing supply control on the hydraulic oil to the hydraulic actuator from the first hydraulic pump; a second hydraulic pump for supplying hydraulic oil for creating pilot pressure; a second pump drive device for driving the second hydraulic pump; an operating device operated in order to control the actuating of the hydraulic actuator; a pilot valve which is actuated based on the operation of the operating device and which creates pilot pressure by using the hydraulic oil pressure supplied from the second hydraulic pump; characterised by a second accumulator capable of accumulating and retaining the hydraulic oil pressure supplied from the second hydraulic pump to the pilot valve; a second switching valve which is provided to a second pump oil channel leading from the second hydraulic pump to the pilot valve, and which performs a control for causing the second accumulator to accumulate and retain the hydraulic oil supplied from the second hydraulic pump, or causing the hydraulic oil accumulated in the second accumulator to be supplied to the pilot valve; and a second control device for detecting an operating state of operating means and performing drive control on the second pump drive device as well as actuation control on the second switching valve on the basis of the operating state; when the operating device is in a non-operating state, the second control device stopping the driving of the second hydraulic pump by the second pump drive device, and when the operating device is being operated, the second control device performing a control for causing the second hydraulic pump to be driven by the second pump drive device and causing the hydraulic oil accumulated in the second accumulator to be supplied to the pilot valve by the second switching valve. a first hydraulic pump for supplying hydraulic oil for actuating the hydraulic actuator; a first pump drive device for driving the first hydraulic pump; a control valve for receiving pilot pressure and performing supply control on the hydraulic oil to the hydraulic actuator from the first hydraulic pump; a second hydraulic pump for supplying hydraulic oil for creating pilot pressure; a second pump drive device for driving the second hydraulic pump; an operating device operated in order to control the actuating of the hydraulic actuator; a pilot valve which is actuated based on the operation of the operating device and which creates pilot pressure by using the hydraulic oil pressure supplied from the second hydraulic pump; a second accumulator capable of accumulating and retaining the hydraulic oil pressure supplied from the second hydraulic pump to the pilot valve; a second switching valve which is provided to a second pump oil channel leading from the second hydraulic pump to the pilot valve, and which performs a control for causing the second accumulator to accumulate and retain the hydraulic oil supplied from the second hydraulic pump, or causing the hydraulic oil accumulated in the second accumulator to be supplied to the pilot valve; and a second control device for detecting an operating state of operating means and performing drive control on the second pump drive device as well as actuation control on the second switching valve on the basis of the operating state; when the operating device is in a non-operating state, the second control device stopping the driving of the second hydraulic pump by the second pump drive device, and when the operating device is being operated, the second control device performing a control for causing the second hydraulic pump to be driven by the second pump drive device and causing the hydraulic oil accumulated in the second accumulator to be supplied to the pilot valve by the second switching valve.