The invention provides an operating vehicles and a control method of the operating vehicle. At the maximum target speed is within the normal speed range, the upper limit of the speed control unit by the motor displacement control unit according to the maximum target speed to control the lower limit of the motor capacity. At the maximum target speed is within the speed range, the upper limit of the speed control unit via a pilot pressure control valve according to the target maximum speed for control of the pilot pressure to the upper limit. Further, the maximum target speed is within the speed range, the upper limit of the speed control unit to drive the circuit pressure the greater the pilot pressure to the upper limit of the larger control of the pilot pressure control valve.