Abstract: In response to the low level of intelligence, strong dependence on manual labor, high labor costs, slow fault detection, and low processing efficiency in the operation and maintenance of passenger information systems in current urban rail transit, this paper designed and implemented an urban rail transit PIS intelligent operation and maintenance platform. Based on technologies such as feature comparison, log analysis, and decision tree, through active detection, intelligent fault detection and diagnosis, disposal decision assistance, remote operation and maintenance, etc., the paper provided functions such as fault alarm prompts, fault information display, fault diagnosis analysis, operation and maintenance decision suggestions, and remote operation and maintenance for operation and maintenance personnel, implemented the rapid response and functional expansion of the entire process of fault discovery diagnosis disposal in PIS operation, and improved the operational and maintenance efficiency and intelligence level of urban rail transit PIS.