| A magnetic reaction wheel operating method includes a sensing step, a judging step, and a switching step. In the sensing step, a plurality of object sensors of a magnetic reaction wheel sense at least one movable object. In the judging step, a processor determines whether a sensing signal strength value of a detecting one of the object sensors which is near a powered one of a plurality of coils satisfies a predefined condition. In the switching step, the processor turns off a current of the powered one of the coils, and then turns on a following one of the coils in a moving direction of the at least one movable object so as to allow the at least one movable object to move along the moving direction. |