In　this　paper,　we　analyze　the　applicability　and　usage　of　the　road　network　reliability　(including　connect　reliability,　unblocked　reliability　as　well　as　recovery　reliability)　as　the　evaluating　indicator　of　the　road　network,　and　take　the　influence　of　rainfall　weather　into　overall　account.　Taking　Beijing　as　an　example,　we　make　an　analysis　of　the　road　network　and　the　points　which　are　affected　by　the　rain　easily,　and　filter　the　key　point　in　concerns　of　the　significance　of　the　node.　The　results　will　be　a　good　support　for　the　government　to　publish　the　emergency　plans.　©　2010　ASCE.