Abstract: Steam is normally used to maintain tank tempetature almost everywhere in China, with a huge quantity of fuel consumed. In order to economize encrgy resounces, the article puts forward a new method, e, i. the solar heat energy accumulator to replace the former.Here is discussed in the article the calculation concerned and initial analysis of some technical and economic porblems in consideration of the crude oil tank characteristics with solar heat energy accumulators used for keeping tanks at constant temperature.