The intermittence and fluctuation of the wind energy results in many adverse impacts on current large-scale utilization of wind power. Storage technology is an effective way to solve this problem， however the expensive cost has been the bottleneck of large-scale energy storage application. This paper puts forward a method to evaluate the power rating and energy capacity of wind power regulation system based on compressed air energy storage（CAES）， that is to minimize the size of the energy storage device under the premise of meeting the standard for wind power integration. Results have been analyzed by using simulation software package. Meanwhile， this paper has established a benefit assessment model for CAES. Compared with traditional fossil-fired power generation units， CAES has considerable benefits.