A train control system, comprising: at least one smart roadside device (1) that is provided along a route through which a train passes, each smart roadside device (1) corresponding to an area of an operation route, and the smart roadside device (1) being used to acquire road condition information in the corresponding area and sending the road condition information to a train located in the corresponding area; and an onboard control device (2) that is located on a train and that is used to acquire train operation information of a current train as well as road condition information sent by the intelligent roadside device (1), and to control the train according to the road condition information and the train operation information. Also disclosed is a train control method.
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