Nowadays, in terms of the volume of published material in Taiwan, picture books play an increasingly important role in the presentation of academic research. In all kinds of picture books, many of them focus on friendship and the character types and attributes vary. According to Aristotle's classification, in terms of its cause, friendship can be divided into three types: interest, happiness, and friends. The aim of this article is to explore the underlying meanings of the characteristics presented in these books and to compare the concept of friendship in these books with Aristotle's classification. Finally, the author's opinions will be discussed in the conclusion.