To change and control the performance of a oil pressure circuit in a software by controlling respective metering valves based on a required speed and utilizable pump flow rate.

A controller 220 receives a direction and speed command and judges a series of proper outputs 230 to the respective metering valves 105 in an independent metering valve 110. The output 230 indicates the current to respective metering valves 105. The controller 220 judges the operation mode of the oil pressure circuit 100 based on the command from the input device 210. The controller 220 arranges respective metering valves 105 in a proper state after finding out the output 230 based on the command from one part of the mode and the input device 210. In the metering state, the controller 220 controls a flow rate passing the metering valve 105 by adjusting a control signal.