The　emphasis　of　bridge　health　monitoring　should　be　placed　on　safety　alarming.　The　Bachimen　Bridge,　a　continuous　rigid-frame　bridge,　was　selected　as　the　engineering　background　in　this　paper.　Firstly,　the　structural　health　monitoring　of　the　Bridge　was　briefly　introduced.　Secondly,　the　methods　of　monitoring　data　processing　and　determination　of　normal　limit　values　of　safety　assessment　were　investigated.　Furthermore,　dynamic　updating　of　the　finite　element　model　was　conducted　on　the　basis　of　structural　health　monitoring,　and　the　baseline　finite　element　(FE)　model　of　the　Bridge　was　then　established　and　verified.　Finally,　the　safety　threshold　values　of　safety　assessment　of　the　Bridge　were　determined　using　the　baseline　FE　model.　Conclusions　are　drawn　from　monitoring　and　FE　analysis　as　follows:　The　health　monitoring　system　of　the　Bridge　can　meet　the　basic　requirements　of　bridge　health　monitoring　and　safety　assessment;　the　methods　for　determination　of　normal　limit　values　based　on　long-term　health　monitoring　and　safety　threshold　values　based　on　the　baseline　FE　model　can　provide　scientific　basis　for　setting　of　the　safety　alarming　values　of　the　bridge　health　monitoring　system.