Multiple circumferential contact points controller and method for controlling the same

Disclosed is a multiple circumferential contact points controller and method for controlling the same. The controller includes an external ring body and an internal control unit (or an external control unit and an internal ring body). The internal control unit is movably (rollably) provided to the external ring body (or the external control unit is movably (rollably) provided to the internal ring body). An inner edge of the external ring body and an outer edge of the internal control unit are each provided with conductors and contact points. As such, the relative movement of the internal and external circumferences can allow controlling of multiple circumferential contact points, to provide quick and convenient uses in various applications.