Abstract: Site preference of underground gas storage is a key factor, which will state a running condition of underground gas storage in a longertime. As to the site preference of underground gas storage, multiple objectives can be considered. Therefore, sufficient engineering andproject demonstration should be carried out in the prophase construction of site for gas storage. According to the successful experiences in construction and operation of existing gas storage in China, this paper describes, in a systematical and quantitative way, the preference indexes for rebuilding the gas storage from the pore-type reservoirs like gas reservoirs, oil reservoirs and water reservoirs into gas storage sites involved in the site type, structural trap, encapsulation, reservoir’s property, fluid’s property, buried depth of the reservoir, the initial reservoir’s conditions, geographical conditions, which is of realistic significance for planning and construction of underground gas storage.