In　view　of　the　lack　of　portability　and　real-time　performance　of　traditional　instruments,　the　monitoring　module　based　on　smartphones　which　can　achieve　the　acquisition　of　structural　acceleration　is　developed.　The　accuracy　and　performance　of　smart　phone　through　dynamic　test　is　verified.　Aiming　at　the　shortcomings　of　the　comfort　evaluation　method　in　the　scope　of　application　and　evaluation　parameters,　the　idea　of　displacement　and　velocity　limits　is　put　forward,　and　the　evaluation　limits　applicable　to　different　structures　are　given.　The　results　show　that　the　limits　of　displacement　and　velocity　can　be　used　as　supplementary　indexes　for　comfort　evaluation　of　flexible　structures.