Abstract: In response to the actual operational requirements of urban rail transit vehicles, an urban rail transit vehicle intelligent operation and maintenance system based on all-element and full-process data fusion is proposed. The overall architecture, technical architecture and business scenarios of the system are introduced, and the implementation mode of the five major subsystems, vehicle health management, intelligent trackside detection, vehicle maintenance management, intelligent locomotive depot management and intelligent general control center, are elaborated. The application value of the system is analyzed. The system can promote data closeloop and integrated application of the entire process of intelligent operation and maintenance of urban transit vehicles.