Kodaly music education system and Orff music education system are famous music education genres in the world. This paper aims to analyze the adaptability in Kodaly and Orff music approaches for preschoolers. By mainly using the research method of literature reviews, this thesis will summarize and expound the Kodaly and Orff pedagogies from the aspects of teaching principles, curriculum setting, course procedure, and etc. The result shows that, on the one side, Kodaly tends to promote children's musical abilities through teaching and activities that revolve around singing. On the other side, Orff hoped that children's musical literacy could be comprehensively improved through extensive teaching activities such as recitation, sound gesture, body movement and instrumental performance. Although Kodaly and Orff teaching approaches have some differences in the teaching procedure and details, they both hold that music should be a tool to foster children's beautiful hearts, and the essential attribute of music education is the comprehensive development of children's aesthetic ability.