The purpose of this study is to investigate for the meaning of Qualitative Research on the reading development study. It is a meta study for a reading development method to be interested in child-reader. The signification for the application of qualitative research on the reading development study is to let himself hear a voice of a leaner during the process of reading development when we study for child reader as a understanding humans. Moreover, the qualitative research on the reading development study is a meaning method for the observation on the process of thinking of children with underachievement in reading. It can be a valuable basement knowledge for the theory deduction of the teaching and learning method of reading. The qualitative research on the reading development study is possible to survey a individual internal variation of reading ability. This study surveyed a individual internal variation of reading ability with the lapse of time on six child-readers. The qualitative research on the reading development study is the meaning for self reflection of a teacher as a researcher of reading education. As we practice a qualitative research for the self reflection diary and the field text of a researcher, we can search a theory of reading education and reading text structure. In short, the qualitative research on the reading development study is possible to prepare a beginning of a human comprehension and ecological reading education, perceive a signification of reading education. this study can provide a theorical foundation for the improvement of reading education method and the restruction of reading text.