Recently, a number of enterprise have introduced Information Systems(IS) to cope with the rapidly changing circumstances and to improve their competitive advantage and successful implementation of Information Technology influence the success of business. Managements identify that it is necessary for systematic analysis and plan to adopt IS throughout the failure of IS projects. So Information Strategy Planning(ISP) is presented as the alternative. Recent, researches in the ISP have concentrated on the examination of large and successful corporations. For this reason, it is difficult that we apply the result to small and medium sized enterprise(SMEs). Thus, this paper searches characteristic of SMEs form informatization point of view and the ISP approach for successful informatization of SMEs.