A laser machining system includes: a laser irradiation device that irradiates a workpiece with a laser beam; a workpiece moving device that moves the workpiece; a laser irradiation controller that controls the laser irradiation device to control an irradiation position of the laser beam; and a workpiece move controller that controls the workpiece moving device to control at least one of the position and the posture of the workpiece. The workpiece move controller transmits information about at least one of the position and the posture of the workpiece to the laser irradiation controller. The laser irradiation controller compensates for the irradiation position of the laser beam based on the information received from the workpiece move controller.