The　authors　studied　the　large　time　asymptotical　behaviors　of　the　smooth　solutions　to　the　initial　boundary　value　problems　for　the　three　dimensional　compressible　Navier-Stokes-Poisson　equations　in　plasma　physics.　By　using　the　classical　energy　methods,　it　is　proved　that　there　exists　a　unique　global　and　smooth　solution　to　the　initial-boundary　value　problems　for　the　3D　compressible　Navier-Stokes-Poisson　equations　which　converges　to　a　stationary　solution　exponentially　fast　as　t→∞　when　the　initial　data　is　near　its　equilibrium.