Abstract: In response to the differentiated seat selection needs of overseas railway passengers, this paper proposed an intelligent seat selection system based on seat bitmap. Based on the intelligent seat selection business process, the paper adopted high-speed caching and data synchronization technology, as well as dynamic rendering technology of seat selection bitmap, implemented functions such as seat bitmap maintenance, carriage seat utilization, and ticketing and seat selection. Practice has proven that the system has the characteristics of intelligence, convenience, and reliability, which improves the efficiency of maintaining seat location information and the ticketing experience for overseas railway passengers.