Objectives The purpose of this study is to find the message to be delivered to infants in the “Rainbow Fish” picture book series, understand the implications of the picture book, and use it as basic data in the educational field.
 Methods The “Rainbow Fish” series examined the overall content and in-depth implications of early childhood picture books based on Greimas (1985)'s sequence analysis, binary confrontation analysis, behavioral analysis, and Barthes (1997)'s semiotic approach to myth theory.
 Results The common feature of the sequence analysis contents of the “Rainbow Fish” series picture book is that it is a happy ending in which all conflicts and problems are resolved. However, there was a difference in the format of the plot. There were two types: a single-line format in which the story unfolds over time, and a circular format in which events in the story progress one after another over time and then return to square one. In the case of binary confrontation analysis, there was a common point that all the situations, emotions, and attitudes of rainbow fish were included, and the differences were confrontation between characters, confrontation between places, and change of mind of rainbow fish. The behavioral analysis of the “Rainbow Fish” series picture book shows that rainbow fish become the same person and main character in the role of the subject and receiver, and the differ-ence between the series is that the role of callers and opponents is different. In addition, depending on the devel-opment of the story, there are times when there are no characters who play the role of assistants, and sometimes the same character changes from the role of the antagonist to the role of assistants. Through the myth analysis of the “Rainbow Fish” series picture book, we were able to derive topics such as finding happiness, forming rela-tionships, empathizing, being interested, solving problems, accepting minds, positive interaction, and resolving conflicts.
 Conclusions This study is significant in that it helps in-depth understanding and interpretation of the “Rainbow Fish” series picture books based on a semiotic approach, and effectively conveys the meaning and literature im-plied in picture books in the field of early childhood education so that they can be applied to the field of early child-hood education.
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