The traditional Enterprise Resouce Planning system belongs to the typical on-line transaction processing (OLTP) system. It just offers a management platform where enterprise policy-making level and staff can make decisions, but it can not offer necessary information satisfied for making decisions directly. The traditional ERP system is a very good back-office management system, but the developing enterprises need the ERP system with the front-office management function at the same time. The traditional ERP system integrated with data warehouse can realize the function change greatly because DW can remedy the limitations of the traditional ERP system. DW, integrated with the traditional ERP system in the way of system structure, can analyze the data drew from the ERP system, and deposit these sample data and analyzed results into itself so that users can inquire these later. It can help users find the potential value of data accumulated in the traditional ERP system, and then it can help enterprise gain extensive competition advantages for a long time.