Abstract: The industrialization and information fusion at corporate level are reflected mainly in the integration of IT into business. Based on the field study of 185 enterprises, this paper studies, from the perspective of corporate IT application levels, the patterns in which IT is integrated into business. The results indicates that on the one hand, the corporate IT and business integration route turns from the basic level to the operating level, then to the strategic level; on the other hand, the unbalance turns gradually to balance in a convergent way. At the same time, this paper further studies the IT and business integration patterns through the analysis of the main obstacles confronted in different IT application levels and the changing trends of the application points. Finally, based on the results, the authors propose corresponding management advice on the corporate IT and business integration.

Key words: corporate IT application level, IT and business integration, upgrade pattern