The electric multiple unit (EMU) maintenance system is a smart operation and maintenance management platform that encompasses all critical elements— "people, machinery, materials, methodologies, and environment." The system establishes a digital full-lifecycle maintenance record for each EMU, digitizing technical drawings, maintenance protocols, and other relevant documentation to create a unified vehicle archive. During the production phase, the system automatically generates production plans based on maintenance schedules and precisely allocates tasks; it also enables frontline personnel to log operational records online, while providing process control for outsourced projects, thereby enabling intelligent production scheduling. Regarding faults and quality, the system implements a closed-loop management process—from fault reporting, diagnosis, and remediation to final acceptance—ensuring that critical maintenance procedures consistently meet required standards. Furthermore, the system integrates material management with maintenance work orders, automatically verifying inventory levels and processing material requisitions, while also covering the maintenance and repair of facilities and equipment within the depot. Ultimately, by centrally consolidating data across all vehicles, equipment, and maintenance activities, the system conducts statistical analyses. This supports management personnel in identifying fault patterns and optimizing maintenance strategies, thereby enhancing the safety and reliability of EMUs while significantly reducing full-lifecycle operational and maintenance costs. In this way, the system truly achieves data-driven decision-making and intelligent maintenance operations.