Network platform has different business model and competitive mechanism with traditional enterprise, credit data has important influence on business model and operation strategy. This paper will take taobao.com as an example based on the network shopping with high permeability, discuss about how the credit data which platform enterprise construct affect the income of enterprise, the development of derivative products, and competitive advantage of platform, and will clarify the important role of the credit data we cumulate. For analyzing the deficiency of credit data, proposing the improving measures, we hope all these contribute to the credit management of platform enterprise development system and credit database development strategy.