In　this　paper,　we　mainly　study　the　global　L-2　stability　for　large　solutions　to　the　MHD　equations　in　three-dimensional　bounded　or　unbounded　domains.　Under　suitable　conditions　of　the　large　solutions,　it　is　shown　that　the　large　solutions　are　stable.　And　we　obtain　the　equivalent　condition　of　this　stability　condition.　Moreover,　the　global　existence　and　the　stability　of　two-dimensional　MHD　equations　under　three-dimensional　perturbations　are　also　established.