Mobility　as　a　Service　(MaaS)　is　to　provide　users　with　customized　one-stop　travel　experience　by　integrating　various　traffic　modes,　effectively　improve　the　travel　service　quality,　and　provide　new　ideas　for　solving　the　problems　of　traffic　congestion,　residents＇　travel　difficulties　and　traffic　pollution.　Combined　with　the　relevant　research　at　home　and　abroad　at　the　technical　level　of　MaaS,　this　paper　summarizes　from　the　following　four　aspects:　the　connotation　and　typical　5C　characteristics　of　MaaS,　the　logical　architecture　analysis　of　MaaS　system,　the　key　technical　requirements　of　MaaS,　and　the　technical　challenges　faced　by　the　future　development　of　MaaS.　A　series　of　problems　existing　in　the　current　MaaS　research　are　analysed　in　detail,　and　relevant　technical　means　are　integrated　to　optimize　the　development　of　MaaS　in　the　future.　The　research　shows　that　it　pays　attention　to　the　research　of　multimodal　public　transport,　integrated　data　depth　calculation　and　path　decision-making　system　under　vehicle　road　cooperation,　uses　artificial　intelligence　technology　to　realize　the　intelligent　identification　of　traffic　state,　and　collects　multi-source　data　to　provide　a　reliable　source　for　the　prediction　of　travel　demand　under　multi-mode.　Give　full　play　to　the　role　of　MaaS　in　improving　travel　quality,　saving　travel　costs　and　reasonably　allocating　traffic　resources.　©　2022　IEEE.