The invention provides an opening type and opening degree auxiliary detecting and dentition movement track indicating device which comprises a bottom plate, a metal ring, an extension bracket and an indicator member. The outside of the bottom plate is provided with the metal ring, and the inside of the bottom plate is provided with an adhesive surface. The extension bracket includes a bending portion and an extension portion. The bending portion is connected to one end of the extension portion, and the other end of the extension portion is connected with the indicator member. The bending portion hooks the metal ring, and a bonding member is bonded to the bottom plate. The opening type and opening degree auxiliary detecting and dentition movement track indicating device can accurately observe the true movement condition of the dentition of a patient, is convenient to install and operate, can be recycled, and has greater versatility. Moreover, the bottom plate is only installed on the lip surface of the teeth, has no influence on the occlusion relationship and can avoid errors caused by the occlusion, so that the purpose of reducing the errors can be achieved.