Abstract: It is the basis for post-evaluation of oil & gas storage and transportation projects to determine the evaluation index system and method.In accordance with implementation process and characteristics of oil & gas storage and transportation projects as well as determination principle of post-evaluation index system, the post-evaluation index system used for overall comprehensive evaluation of oil & gas storageand transportation projects in stages is built and scientific and practical evaluation process and method are established by the combination of analytic hierarchy process and success-degree method. Influence and ongoing evaluation index system evaluations are taken as an example to describe elevation method combined with analytic hierarchy process and success-degree method, process and results. The method canprovide an effective way to the scientific and accurate evaluation in oil & gas storage and transportation projects. It is recommended to make managers, technical experts and engineers with management and technology experiences in relevant areas fully participate in the evaluation to obtain more scientific and accurate evaluation results.