The present disclosure provides a magnetic reaction wheel operating method including a sensing step, a judging step, and a switching step. In the sensing step, a plurality of object sensors of the magnetic reaction wheel sense at least one movable object. In the judging step, a processor is configured to determine whether a sensing signal strength value of a detecting one of the object sensor 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 moving object so as to allow the at least one movable object to move along the moving direction. Therefore, the magnetic reaction wheel without any axle can be driven effectively through manipulating the magnetic field. |