The energy efficiency and features of open docks and refrigerated docks are discussed. Two kinds of dock are analyzed under the same cold store conditions. Annual heat loads are calculated for the two cases. The results show that the annual refrigeration load of the refrigerated dock is only 31.1% of that for the open dock. The energy efficiency of the cold store, as well as the quality of refrigerated food, will obviously be improved when a refrigerated dock is adopted in a cold store.