A method for aligning a calibration device with a vehicle based on a wheel aligner, wherein: the wheel aligner comprises a bracket, at least one image sensor (12, 14) and a computer communicatively connected to the at least one image sensor (12, 14); the at least one image sensor (12,14) comprises at least two first image sensors and at least one second image sensor, the at least two first image sensors are disposed at two ends of the bracket, the at least one second image sensor is disposed in the middle of the bracket; the method comprises the following steps: controlling, by the computer, the at least two first image sensors to image a vehicle-mounted target on the vehicle, and processing an obtained image to determine a position of the vehicle; controlling, by the computer, the at least one second image sensor to image a reference target on the calibration device, and processing an obtained image to determine a position of the calibration device, the reference target on the calibration device being disposed on the side of the calibration device facing away from the vehicle and facing the bracket; and determining, by the computer, an adjusting mode of the calibration device based on the position of the vehicle and the position of the calibration device, so that the calibration device is aligned with the vehicle according to an anticipated position or direction. the wheel aligner comprises a bracket, at least one image sensor (12, 14) and a computer communicatively connected to the at least one image sensor (12, 14); the at least one image sensor (12,14) comprises at least two first image sensors and at least one second image sensor, the at least two first image sensors are disposed at two ends of the bracket, the at least one second image sensor is disposed in the middle of the bracket; the method comprises the following steps: controlling, by the computer, the at least two first image sensors to image a vehicle-mounted target on the vehicle, and processing an obtained image to determine a position of the vehicle; controlling, by the computer, the at least one second image sensor to image a reference target on the calibration device, and processing an obtained image to determine a position of the calibration device, the reference target on the calibration device being disposed on the side of the calibration device facing away from the vehicle and facing the bracket; and determining, by the computer, an adjusting mode of the calibration device based on the position of the vehicle and the position of the calibration device, so that the calibration device is aligned with the vehicle according to an anticipated position or direction. controlling, by the computer, the at least two first image sensors to image a vehicle-mounted target on the vehicle, and processing an obtained image to determine a position of the vehicle; controlling, by the computer, the at least one second image sensor to image a reference target on the calibration device, and processing an obtained image to determine a position of the calibration device, the reference target on the calibration device being disposed on the side of the calibration device facing away from the vehicle and facing the bracket; and determining, by the computer, an adjusting mode of the calibration device based on the position of the vehicle and the position of the calibration device, so that the calibration device is aligned with the vehicle according to an anticipated position or direction.