To help steel companies get rid of slump and achieve low-carbon development, this essay integrate energy-saving concept into iron and steel enterprise of strategic alliance partners, and adopts the methods such as surveys and interviews to look for and filter out the impact indicator for it to select from the perspective of energy conservation service, and make arrangement and categorization. The importance of indicators are analyzed by analytic hierarchy process (AHP), so as to determine the weight of each indicator to discuss the impact of important index on the alliance development of iron and steel enterprises.