This study was designed to analyze the trends in domestic studies on wordless picture books. Sixty-nine theses, 2 dissertations and 27 articles were selected, investigated and analyzed. The findings of the study are as follows. First, research on wordless picture book has consistently been conducted since 1987. Second, concerning the trends for methods used in these study, experimental researches was the most common method, followed by in descending order descriptive methods, qualitative methods, and mixed methods with quantitative and qualitative research. Third, 5 year old children were the most common subjects in wordless picture book research. Forth, regarding the trend for research type, most of the research was effect research which investigated the effectiveness of the wordless picture books and their book activities related to various aspects of children`s development. Some research was on the popularity and distinctiveness of wordless picture books or on the various styles of the illustrators. Other researches on wordless picturebooks dealt with the responses of children, teachers, and parents. This study determined from the analysis that previous research on wordless picture books focused too much on a certain age, method, and type of research. Despite the educational effectiveness of the wordless picture books emphasized by early childhood teachers, wordless picture books are rarely used in kindergarten classrooms. Thus, this study suggests that further researches on teaching strategies for wordless picture books are needed and that these studies focus on including diverse age groups and research methods.