The concept of Maas（mobility as a service）is bringing a new revolution to the transportation and automobile industry. How to use diversity of big data resources to develop Maas system has become the focus of many enterprises. This paper analyzes development status of Maas system based on big data from the aspects of transportation difficulties，national policies data center construction，data open sharing，application scenarios，etc.. Furthermore，the development of Maas system in key cities is studied in depth. Based on the above research，this paper explores the future development trends of Maas system based on big data，and provides some ideas for the future strategic planning of enterprises.