In　order　to　improve　the　durability　of　a　bridge　and　decrease　the　initial　and　future　cost　of　bridge　construction,　an　important　idea　-　Life-Cycle　Cost　Analysis　(LCCA)　is　introduced　in　this　paper.　The　authors　firstly　constructed　the　LCC　classification　framework　according　to　the　situation　of　China,　and　then　comprehensively　investigated　various　costs　within　a　bridge＇s　lifetime,　by　combining　with　some　economic　parameters　such　as　inflation　rate,　social　discount　rate,　etc.　Finally,　an　economic　model　of　a　bridge＇s　lifetime　was　built　and　a　domestic　bridge　was　taken　as　an　example.　Calculation　and　result　analysis　of　the　example　prove　that　the　life　cycle　cost　of　bridges　should　be　comprehensively　considered　in　the　investment　decision　making　and　conceptual　design　stages　as　well.　©　2013　WIT　Press.