The underground gas storage plays an important role in aspect of adjusting the contradiction of supply and demand of natural gas in winter and summer, ensuring  the requirement of consumer and optimizing the function of gathering and transferring system. On the basis of collection and analysis of abroad related data, the  best option of underground gas storage established is put forward, that is, the depletion reservoir with ascendant geographical location, simple structure and without deleterious gas, such as dioxide sulfur and so on. At the same time, the following results are proved through the successful experience of underground gas storage construction of Dagang oil field, that is, the key of well location arrangement of underground gas storage is reservoir physical characte  ristics and homogeneity, the success key of gas storage construction is focused on trap confine, and the storage capacity is the important mark of peak-adjusting capability of gas storage.