This paper focuses on the evaluation of informational technology corporations' competitiveness, and tries to provide a plausible evaluation index which will help IT corporations to hold sustain competitiveness and make a sustainable developmental strategy. This paper studies the situation of IT corporations' competitiveness by survey from four aspects, which includes R&D, marketing, internal management ability, corporation finance, and discusses the feasibility that use BP neural network to deal the comprehensive evaluation of IT corporation's competitiveness.