This paper is to introduce the definition and background of EDMS and present real customer project in manufacturing industry as reference. EDMS has DM, Workflow, Imaging and COLD as key components and should be interconnected with many advanced technology, such as SAP, PDM and KMS. Managing and controlling documents is an important part of business success. The number of electronic documents in use in the workplace is escalating rapidly, making it difficult for conventional IT systems to take full advantage of the benefits of digital documentation "A"company implemented DM and Workflow based on groupware So, all of SPECs and drawings could be easily stored and accessed via LMS. Also, the cycletime of ECN/DCN process could be reduced to one or two days from one or two weeks more The overhead resources from the managing documents and involving with work process could be re-deployed to the more productive positions and the increasing of revenue is expected soon because of the competitiveness. "A"company is expected to have more benefits, that is, lots of tangible and intangible benefits from now on.