Intelligent horizontal-attitude stair-climbing wheelchair and rotary stair-climbing method

The invention provides an intelligent horizontal-attitude stair-climbing wheelchair and a rotary stair-climbing method. The intelligent horizontal-attitude stair-climbing wheelchair comprises an upper plate, a switching plate and a lower plate, wherein the upper plate is fixedly connected with a chair, and rear wheels are arranged on the lower side of the chair. The chair is connected with front legs through a front leg lifting system, and front wheels are arranged on the front legs. The front leg lifting system lifts the front legs to a horizontal attitude, and four liftable outer legs are fixed to the lower side of the upper plate. The upper plate and the switching plate are connected through a steering shaft and rotate relatively to each other through the steering shaft, and the switching plate and the lower plate are connected with each other through a leading screw and realize relative rectilinear motion through the leading screw. Four liftable inner legs are fixed on the lower side of the lower plate, and the inner legs are arranged on the inner side of the outer legs. The intelligent horizontal-attitude stair-climbing wheelchair runs on a level ground fast or slow, and climb stairs to realize two functions.