Bearing life test system and method

The invention discloses a bearing life test system and method. The system comprises a base, a motor, a bearing sleeve and a center shaft, wherein the bearing sleeve is provided with a plurality of step ring holes which are concentrically arranged and matched with the outer diameter of a bearing to be tested, the inner diameters of the step ring holes are sequentially increased, the end portions of the step ring holes are provided with internal threaded holes, and a power output end of the motor is connected with the center shaft; the center shaft penetrates through a bearing to be tested, the base is connected with the center shaft through a first support and a second support which are arranged at two ends of the bearing sleeve respectively, the two ends of the bearing sleeve are each provided with a detachable end cover, and each end cover is further provided with a heat dissipation lubricating oil pipe communicated with the lubricating device; an axial driving device and an axial vibration exciter are furth