As an independent facility for storing, sending and receiving oil products, oil storage tanks often have the characteristics of major dangerous sources--with the characteristics of high risk and danger. Thus, once it’s out of work, the consequences will be unthinkably serious. Controlling valves are the important equipment of storage tank. Hence, the design and type selection, safety quality and design scheme of vales have an important impact on the normal operation of storage tank. Based on the current situation of the tank control system in the petroleum storage industry, this paper analyzes and discusses the application of the tank control valve system from the aspects of design, construction and later operation, and refers to the wide use of the automatic control instrument system, and puts forward reasonable suggestions.