A method for aligning a calibration apparatus with a vehicle based on a wheel aligner. A wheel aligner (10) comprises a first image sensor (12) and a computer (15). A calibration apparatus (20) comprises a second image sensor (25). The method comprises: the computer (15) controlling the first image sensor (12) to image a vehicle-mounted target (320) on a vehicle (30), and processing an obtained image, so as to determine the position of the vehicle (30); the computer (15) controlling the first image sensor (12) and the second image sensor (25) to image a reference target (400), and processing an obtained image, so as to determine the position of the calibration apparatus (20), wherein the positions of the calibration apparatus (20) and the vehicle (30) are in the same coordinate system, a reference target (320) is placed near the vehicle (30), and the reference target (320) is in the field of view of the first image sensor (12) and the second image sensor (25); and the computer (15) determining, according to a positional relationship between the calibration apparatus (20) and the vehicle (30), a method for adjusting the calibration apparatus (20), such that the calibration apparatus (20) is aligned with the vehicle (30) according to an expected position or direction. By using the method, the calibration apparatus (20) can be conveniently and accurately aligned with the vehicle (30).
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