The　Bachimen　Bridge,　a　continuous　rigid-frame　bridge　with　spans　of　90+170+170+90m,　was　selected　as　an　engineering　background　in　this　paper,　the　structural　health　monitoring　of　the　bridge　was　briefly　introduced.　The　determination　method　of　normal　limit　values　and　safety　threshold　values　for　safety　assessment　were　investigated　and　proposed　using　the　baseline　FE　model.　An　integrated　assessment　method　of　bridge　safety　combined　with　the　uncertain　analytical　hierarchy　process　(AHP),　the　group　decision-making　theory,　the　principle　of　set-valued　statistics,　gravity　center　based　decision　theory　and　variable　weight　theory　was　proposed　and　applied　in　safety　assessment　of　the　bridge　in　normal　daily　weather　as　well　as　the　strong　typhoon　weather.　The　comprehensive　analysis　remark　in　the　normal　daily　weather　was　95.422,　while　the　remarks　in　the　strong　typhoon　weather　condition　were　95.466.　The　results　indicated　that　the　bridge　worked　well　in　these　conditions.