  The solar activity provides an important impact not only on the intensity of
cosmic rays but also on the earth environment. In this paper, a coupled
oscillator model is proposed to explain the solar activity. By this model the
89 year Gleissberg cycle can be naturally reduced. Furthermore as an
application of the coupled oscillator model we try to apply it to the El
Nino-La Nina phenomena (ENSO). The 22 year oscillation of the Pacific Ocean is
naturally explained. Finally we search a possible substance of the coupled
oscillators in actual solar activities.
