Abstract: In order to construct scientific and reasonable evaluation index system for engineering materials and realize selecting material by comprehensive evaluation, on the base of that determining evaluation index system of engineering materials belongs to tree structure, constructing evaluation index system of engineering materials with question list method, target decomposition method or the combination of both methods was proposed. Regarding the construction of evaluation index system for storage pot material under low temperature working condition as example, the application of methods mentioned above on the construction of evaluation index system of engineering materials was introduced. The results show that question list method, target decomposition method and the combination of both methods are suitable for the construction of evaluation index system of engineering materials.