The purpose of this research is to explore the joint e-book reading on the literacy of young children, adopting the case study. The researching object is the researcher’s daughter who is three and half years old. The joint book reading has been applied 7 times within 7 weeks, and the illustrated e-book is based upon the garden pictures produced by Children Culture Hall of the Ministry of Culture. We used the Peabody Picture Vocabulary Test-Revised to conduct the pretest and posttest, the research finding of which showed the point higher than that of those who didn’t join the joint e-book readings. We have further discovered that the illustrated e-book used in the joint reading is not only causing young children’s motive but also cultivating their concentration on the story content while the child is accompanied and instructed by adult in the process of rereading. According to the research findings, the researcher further propose this conclusion to serve as the references for oncoming study and
teaching purpose.