Abstract: The present disclosure provides a method for treating Alzheimer's disease including the following steps. An effective amount of nano-micro magnetic stir bars is administered to a tissue of a subject suffered from Alzheimer's disease. A rotating magnetic field is provided to the subject, wherein each of the nano-micro magnetic stir bars rotates in the tissue correspondingly to the rotating magnetic field. A reacting step is performed for a reaction time, wherein the tissue generates a rotating microflow corresponding to a rotation of each of the nano-micro magnetic stir bars, and a plurality of amyloids are moved within the tissue along with the rotating microflow and then aggregate so as to form a plurality of amyloid aggregates. A removing step is performed, wherein the amyloid aggregates are captured and collected by phagocytes of the tissue so as to be removed from the tissue of the subject.