A　nonautonomous　discrete　predator-prey　system　incorporating　a　prey　refuge　and　Holling　type　II　functional　response　is　studied　in　this　paper.　A　set　of　sufficient　conditions　which　guarantee　the　persistence　and　global　stability　of　the　system　are　obtained,　respectively.　Our　results　show　that　if　refuge　is　large　enough　then　predator　species　will　be　driven　to　extinction　due　to　the　lack　of　enough　food.　Two　examples　together　with　their　numerical　simulations　show　the　feasibility　of　the　main　results.　©　2012　Yumin　Wu　et　al.