The　deck　roughness　of　Tongshan　Bridge　in　Fuding　was　measured　by　using　leveler　and　laser　continuous　pavement　profilometer　respectively.　Maximum　entropy　method(MEM)　for　the　spectrum　analysis　of　deck　roughness　was　adopted,　and　the　advantage　of　laser　continuous　pavement　profilometer　was　obtained.　The　deck　roughnesses　of　several　concrete-filled　steel　tubular(CFST)　arch　bridges　were　collected　and　analyzed,　and　the　presented　relationship　between　two　main　methods,　which　are　power　spectral　density(PSD)　method　and　international　roughness　index(IRI)　method,　was　configured.　The　deck　roughnesses　were　evaluated　from　main　beam　type,　main　span　of　arch　and　service　years.　It　is　found　that　IRI　value　with　exponential　form　increases　following　service　years.　Therefore,　the　relationship　between　deck　roughness　and　service　years　is　presented,　which　can　simply　predict　the　deck　condition　of　CFST　arch　bridge.