The invention discloses an energy-saving electric vehicle which comprises a bicycle. The bicycle comprises a bicycle frame, a folding pipe rotationally connected to the front portion of the bicycle frame through a horizontal hinge pin, a steering pipe which is rotationally connected to the front portion of the folding pipe and is perpendicular to the hinge pin, a front fork fixedly connected to the lower end of the steering pipe, an electric wheelbarrow detachably connected to the front fork, a headstock pipe fixedly connected to the upper end of the steering pipe, and a rear wheel connected to the rear end of the bicycle frame through a rotary shaft. The energy-saving electric vehicle can be used outdoors as an exercise bicycle and can also be used as an electric vehicle driven by the electric wheelbarrow.