The invention belongs to the field of vehicles, and particularly relates to a mobile cabin, a rail, and a three-dimensional rail transit system. The mobile cabin includes a mobile cabin chassis, wherein a transparent housing is arranged on the mobile cabin chassis, two or more seats are arranged in a cavity defined by the transparent housing and the mobile cabin chassis, front rubber steering wheels and a rubber driving wheel are arranged on the mobile cabin chassis, the front rubber steering wheels are guide wheels, and the rubber driving wheel is used for driving the whole mobile cabin. The invention has the remarkable effects of improving the traffic capacity and the comfort of personal travel and realizing intelligent traffic.