An object is to enable accurate machining by enabling shots to be accurately blasted on a workpiece even while workpiece is being deformed. A part manufacturing system includes: a peening device including a nozzle that projects a plurality of shots toward a workpiece, and a sensor that detects a distance to the workpiece; and a machining robot including a hand to which the peening device is attached, and a control unit that adjusts a position or an orientation of the peening device by controlling the hand based on the distance detected by the sensor.