从目前城市轨道交通信息化发展趋势出发，阐述在线网运营转型中面临的问题与挑战。结合《智慧城市轨道交通信息技术架构及网络安全规范》的要求，探讨城轨云架构作为基础平台在促进城市轨道交通信息化发展中的作用；研究云平台、网络安全、数据共享以及智能运维4个主要构成模块的功能与要求；重点探讨云平台作为城轨云架构的关键技术，其功能要求与技术选择将直接影响行业信息化的建设与发展；在具体工程项目中，应重点关注云平台技术的安全性、可靠性、稳定性以及可扩展能力，以统一服务“线网全业务、城轨多制式”为目标，构建一个开放的信息化基础平台。

The problems and challenges in line operation transformation are described herein from the perspective of the current development trend of urban rail transit informatization. ?According to the Smart city rail transit information technology architecture and network security specifications, the design and development of the industry informatization involves several vital aspects: evaluation of urban rail cloud architecture as a basic platform in promoting the development of urban rail transit informatization; research on the functions and requirements of the cloud platform, network security, data sharing, and intelligent operation and maintenance O&M modules; and emphasis on the cloud platform as the key technology of the urban rail cloud architecture, its functional requirements, and technology choices. In real-world projects, the security, reliability, stability, and scalability of the cloud platform should be prioritized, and the building of an open information platform is suggested for all services of the urban rail network and the multiple modes of the urban rail.

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