This research is about how ERP system affects the strategy of a company. The paper use strategy matrix as a measurement tool for the changes of strategy changes. We use resource-base view as the base of theory. In this case study, we can learn how small and medium enterprises use information technology for better preference. The implementation of ERP system will changes the allocation of resources and ability of the company. In this process, it will also changes strategy of the company. The implementation also affects value chain for the company; the company, which instills such a system, must evaluate those changes before the implementation. With the data collected from the case, we have some findings about the relation between the implementation of ERP system and strategy of a company. First, ERP system can provide the company an intergraded platform for all it¡¦s business. Second, the implementation of ERP system will help company relocate it¡¦s activities. Third, ERP system will also changes the relations between companies. At least, ERP system will help company accumulate different resources and develop new ability for new strategy. We suggest company which want to instill such system must well planning their relation between other companies and effects of organization changes.