Abstract
Digital age has chaneged human behavior. A quick response and group decision mechanism is already a basic issue for a company to improve it's competition ability. A disision maker can not wait any more for a answer when problem happens. Now we would like to prevent a event before it happens. So everything in a compony is recorded daily and use it smartly to find a way to survive for a company. This research it based on a network platform, drived by knowledge management, categoried by five force and SWOT analysis, and built by Outlook 2000. We construct a Strategic Information System by e-mail interface and test this system by a e-commerce company. The result are: 1. This system is to be successed by user attitude and high-level manager. If they do support this system, it will perform better. 2. Strategic thinking can be taught by a good system design.