Calibration system and calibration method

The invention provides a calibration system and a calibration method. The calibration system and the calibration method can solve the problems that only the focal length of an optical axis can be calibrated and calibration of laser displacement sensors of various different models cannot be considered in the prior art. A first aspect of the invention provides a calibration system. The calibration system includes a target plate, a camera, a moving mechanism, a clamping jaw, and a control portion. The target plate is arranged behind the lens and receives light spots generated after light emitted by the light-emitting part passes through the lens. The camera recognizes the size of the light spot and/or the offset of the light spot with respect to the predetermined position. And the target plate and the camera are arranged on the moving mechanism. The clamping jaw is used for fixing a lens; the control unit is configured to control movement of the clamping jaw based on a recognition result of the camera so as to a