Abstract: As the situation of each information application system is used independently and some information islands exist in Beijing Urban subways，this paper presents a system frame of integrated information system infrastructure of Beijing subway．Based on the multilayer system frame it is presented that the corresponded method of information exchange is achieved for the present and future information system．At the same time the realization is given． The application of system shows that the system is advanced and practical for Beijing urban subway transportation management．

Key words: raft transit, data exchange, heterogeneous data, information system, exchange engine, integrated utilizing

摘要： 针对目前北京城市轨道交通各个信息系统独立应用，存在大量信息孤岛，信息无法综合利用的现状．提出了北京城轨交通综合信息系统的体系结构，同时基于多层体系结构提出了信息交换的方法和手段，并针对现有的和即将开发的信息系统提出了相应的解决方法，给出了三种信息交换方法的具体实现，系统的初步应用表明：本系统先进实用，能够实现北京城市轨道交通信息的立体化、全方位管理，达到挖掘北京城轨交通潜力的目的．

关键词: 轨道交通, 数据交换, 异构数据, 信息系统, 交换引擎, 综合利用