In this paper, we make clear the success factors of ERP through the demonstrative analysis for introduction of ERP in company. We derive the influence factor when the ERP package is introduced in company by observing the condition of present ERP package, and study the relationship of successful introduction of ERP and the characteristics of organizational environment and information system. Furthermore, we show the useful material to guide the way of successful introduction for the company which has a plan to introduce the ERP system.