High-speed train intelligent system and communication method thereof

The invention provides a high-speed train intelligent system, which comprises a vehicle-mounted intelligent sensing node S105, a train control system vehicle-mounted portion S106, a vehicle-mounted data center S107, a vehicle-ground wideband communication system S108, a ground data center S109, a main engine plant and/or bullet train base application system S110, a collecting terminal of internet of things S101, a wideband application system S102, one or a plurality of sensors S103 and an input/output (I/O) interface device S104. The high-speed train intelligent system achieves self-detection, self-diagnosis and self-decision of a train system, information management of whole lifecycle of train parts and the like.