Customer, information and functions are in the same level in the traditional computer application systems, and all customers are treated by the same interface to implement the standardized service functions. However, in general, 80 % of the profits come from 20 % of the key customers. These key customers should deserve better services. Therefore, the enterprises have to response quickly to their needs of individualized information service. In this paper, a detailed case of individualized information service in the field of iron and steel manufacturing supply chain is introduced, and valuable content is extracted and pushed from mass data to constitute a business environment of information sharing that creates value for the customers. The individualized information push mode for the key customer is studied and a functional frame and an operating system for the information service system based on the workflow are introduced.