An automobile brake energy recovery system relates to an internal combustion engine vehicle energy recovery and recycling device structure. The system structurally comprises the following parts: 1, a structure for brake energy recovery under the condition of not affecting the brake performance of an automobile: 2, a structure for energy conversion and storage: 3, a structure for automobile brake energy recovery to fulfill the retardance function; 4, a structure for exerting stored energy on an automobile power steering system; 5, a structure for exerting stored energy on an automobile refrigeration air conditioner systems; and 6, a structure for exerting stored energy on automobile starting. Energy generated during the brake of the automobile is recovered and converted to hydraulic energy, to be used for the starting, retardance brake and power steering of the automobile, and the purposes of the automobile energy conservation and environmental protection are realized. Mechanical energy in the brake of the automobile comprises the kinetic energy generated before the brake of the automobile and the potential energy generated when the automobile descends. The energy recovery system is applicable to all kinds of front drive, rear drive or all-wheel drive passenger vehicles and commercial vehicles such as chemical petroleum fuel (gasoline, diesel, natural gas and liquefied petroleum gas) automobiles and alcohol fuel vehicles.