“Shuo Wen Jie Zi” as the progenitor of the systemic dictionaries, Xu Shen (58-147) explained Chinese characters from the the initial binding of the text form, sound and meaning, and explored the original meaning and font of the Chinese characters, he wanted to establish a Xiaozhuan-based system. According to the method of combining shape and meaning to establish standards of using words, language (semantics) required each narrated, when only one corresponding to the most appropriate form of words, "one font, one function" seems to be the best rule; next, from this point of origin of the characters -formation, when a character was created, there should only be one kind of communication feature, therefore, " one font, one function "should seem the most logical character development outcomes. However, in the “Shuo Wen Jie Zi”, In addition to the simple case than a character corresponds to a meaning, there are several other situations :(i) There are Chinese character variations blow the official seal characters, it’s the situation of "several fonts, one function” ; (ii) A font appears blow several official seal caracters or is not only one meaning, it’s the situation of "one font, several functions”; (iii) A font appears several times and be the official seal characters. The corollary of the above paragraph (i) types of situations, obviously for different stages of development to produce the text, other situations respect to the " Shuo Wen Jie Zi " an attempt to establish the system of writing and word book editing system, its legitimacy is It seems to have doubts, so for this article was to explore the topic.