Informatization is a very important part of enterprise technological strategy, which has great influence on the competitiveness and the sustainable development of an enterprise. Nowadays, many companies have tried their best to explore the role of Enterprise Informatization. They want to change it from a tool for increasing efficiency only to a great strategic partner of their companies. This article researches the development of the enterprise information technology and its influence, and explains the importance of Enterprise Informationization in terms of its contribution to the enterprise development. Meanwhile, the application of information technology are also discussed in this article according the situation of the China Overseas Holdings Limited and together with the COB development (shanghai)CO.LTD. Finally, we will point out the advantages and disadvantages which informatization brings to the enterprise, and expect the future direction.