To provide a bench test method for reproducing actual running conditions applying long cyclic acceleration, without adding special mechanisms to a road simulator 1, and to provide a bench test system.

In the bench test method for vibrating a vehicle 3, in accordance with a target wave and performing durability test of the vehicle 3 on a bench, the low-frequency components of the target wave are converted into vehicle inclination signal and makes the vehicle 3 incline by the vehicle inclination signal.