Disclosed a dual-function electric stair-climbing vehicle. A bicycle-like saddle is mounted at an upper part of a frame of the vehicle; and a worm gear reducer is mounted at a middle part of the vehicle for driving two rotating legs to climb up or downstairs. The vehicle is mainly used for fire rescue in high-rise buildings, equipment maintenance of high-rise buildings when no elevator is available, and fast transportation of equipment, materials and firefighters or maintenance men upstairs. When the width of a corridor is greater than 1.1 m, the vehicle can be rode upstairs directly with people and goods; when the width is less than 1.1 m and greater than 0.9 m, people need to get off and make a turn; and when the width is less than 0.9 m, the vehicle is not available. The dimension of the frame is about 1200×550×380 mm.