Abstract: There are multifarious automatic metering systems for oil depot presently, all of them should be verified in practice for whether they can really and reliably help oil depot to realize various management functions of metering and meet metering requirement for future development. The article introduces a set of metering system with mixing method, including its constitution, operation and examination. Result shows that comprehensive management level in oil depot can be raised greatly by using this metering system with high preciseness, good stability and reliability.