With the development of computer and its application technology, especially the rapid development of information technology, it is imperative for all survey and design institutes to establish their own local area networks, and the General Hospital also requires first-class hospitals to build their own networks in 2000. But why build a network? What kind of net to build? How much bandwidth is appropriate? What are you doing online? ..................................................................................................................................................................................: But why build a network? What kind of net to build? How much bandwidth is appropriate? What are you doing online? How to share information? What can I do besides information and equipment? How to improve the efficiency of CAD survey and design through network? How to realize ISO9000 management through network? These are all issues that everyone cares about, and everyone hopes to have a systematic and complete solution. This paper makes some preliminary discussions on these issues. 1 the present situation and problems of computer application in engineering design field Since 1980s, the application of CAD in engineering design industry has made great progress. Most design units have given up drawing boards and adopted computer-aided design, and the CAD application of some design institutes has reached a quite high level. In recent years, the CAD drawing rate of many hospitals has reached 100%. However, with the deepening and popularization of computer application in various design institutes, some problems are gradually exposed. During the 10 years of popularizing CAD application, many engineering design units have accumulated a large number of electronic documents and drawings, which are intangible assets, and their accumulation constitutes the most precious wealth of enterprises. However, these electronic information are scattered on a single PC, so it can't be appreciated and used, and it can't be searched and queried effectively. Due to the lack of management, it becomes electronic waste over time, which affects daily production. Design institutes urgently need to organize and manage the existing electronic information effectively. In order to participate in the competition in the international market, the quality standard system of enterprises must be in line with international standards. The workflow control module in PDM (product data management) products can provide a powerful tool for the implementation of ISO9000 because of its strict process audit and constraints. The engineering design department has begun to rethink, reorganize and optimize the internal design tools and reorganize the design process from the perspective of the whole product life cycle, so as to organize production more effectively. However, it faces the following problems: With the increasing number of various electronic storage drawings and documents, how to effectively manage, browse and find these electronic drawings and documents? Modify the design, use computers and existing drawings to improve work efficiency. How to effectively enjoy information resources? When the design changes, how to use the version strategy of drawings to track the design to ensure the consistency and effectiveness of information? How to use computers to effectively integrate TQM or ISO9000 quality standards into the design process? How to standardize and manage the design process? How to strengthen communication and cooperation among designers in the design process? How to archive a large number of historical materials, manage them by computer, accumulate them step by step, and establish general parts and general picture library? How to effectively balance, adjust and evaluate the workload of project team members? How to effectively track and adjust the progress of projects and subprojects? The solution to the problem is to establish a suitable network and have corresponding network application software. Discussion on network application scheme of engineering design