The grade-schooler could develope computer literacy education with the Peer tutoring system which is method of one higher level learner can teach and help another learner. This system can hold the result in common each other, also a progress to get the successful result. Moreover, they do the project in cooperation. After the application of the peer tutoring, the basic of computer ability increase in quality. We have side-effects which are increased the interest of computer function after real teach and learning process. And we get good atmosphere which is confidence each other and helping mood in studying another school work. If this study should process changed form, it will be developed more regular system than this study.