In　view　of　the　shortcomings　of　traditional　vibration　testing　instruments　in　portability　and　real-time　performance，a　real-time　monitoring　module　is　developed　based　on　smart　phones，and　the　accurate　acquisition　of　structural　vibration　signals　and　comfort　analysis　are　realized.　The　accuracy　and　performance　of　the　testing　vibration　signal　from　smart　phones　are　verified　by　structural　shak‑　ing　table　test　and　floor　vibration　test.　In　order　to　overcome　the　shortcomings　of　the　traditional　comfort　evaluation　methods　in　the　scope　of　application　and　the　types　of　evaluation　parameters，the　idea　of　using　the　fourth　power　vibration　dose　value　of　displacement　and　speed　as　the　comfort　evaluation　index　is　proposed，and　the　comprehensive　comfort　limit　requirements　for　bridges　and　structures　are　given.　Smart　phones　are　used　to　test　the　vertical　vibration　of　one　footbridge　and　one　building　floor，and　the　comfort　is　systemati‑　cally　and　deeply　evaluated　through　multiple　indexes　and　the　limitations.　The　results　show　that　for　the　comfort　evaluation　of　long　flexible　structure，the　fourth　power　vibration　dose　value　of　displacement　and　velocity　should　be　taken　as　the　supplementary　evalua‑　tion　index，and　the　multi　segment　data　should　be　comprehensively　analyzed.　©　2023　Nanjing　University　of　Aeronautics　an　Astronautics.　All　rights　reserved.