With intellisense, expert diagnosis, data mining, feature analysis, intelligent decision-making and other means, SCLEAD carries out train detection and maintenance plan, process, data, analysis, diagnosis and decision-making management, constructs a closed-loop system with traceability for the whole service life of the train, and realizes the refinement, process automation and intelligent management of maintenance operations around different maintenance processes, which is applicable to the maintenance workshop of EMU, locomotive adn urban rail transit.