Method, and relative station, for checking tyres by means an acquisition system (4) of three-dimensional images of a surface of a tyre, wherein the acquisition system (4) comprises a camera (5), a linear laser source (7), and a reflecting element (11) having a reflecting surface (12), wherein a first three-dimensional image of a portion of inner surface of the tyre is acquired with the reflecting element (11) in a first operating position in which the reflecting surface (12) crosses both the propagation axis (9) of the laser beam and the optical axis (6) of the camera and wherein a second three- dimensional image of a portion of outer surface of the tyre is acquired with the reflecting element (11) in a second operating position in which the reflecting surface (12) does not cross neither the propagation axis (9) nor the optical axis (6).