This　paper　put　forward　a　bidding-decision　frame　system　which　was　based　on　risk　analysis,　and　gave　a　case　study　of　its　application.　The　conclusions　are　as　follows:　(1)　Research　on　risk　management　and　bidding　decisions　has　important　values　in　mitigating　the　losses　once　risk　happen.　(2)　The　research　should　be　dynamic,　because　the　risks　in　the　construction　are　dynamic.　(3)　The　analysis　should　be　both　quantified　and　qualified.　©　2011　IEEE.