The invention makes it easy to link wheel alignment inspections to improving stability when traveling and to suppressing uneven tire wear. The straight running state of a vehicle is verified (S1), and the vehicle is placed on a tester in the straight running state (S2). The wheel alignment of the vehicle in the straight running state is measured using the tester (S3). The individual toe of each front wheel and each rear wheel is adjusted to eliminate differences between the left and right wheels (S4). The wheel alignment, such as the included angle, is measured again, and the causes of any wheel alignment failures are narrowed down on the basis of the measurement results (S5 to S7). Wheel alignment failures impacting steering pull or uneven tire wear are evaluated on the basis of the results of the measurements in S3 (S8).