Li Yun is a book written by Liu Qiu in the Song Dynasty. This book contains a collection of inscriptions in Han Dynasty and arranged in order of 206 rhymes. During the period from Small Seal to Official Script, it is of great value for studying changes in fonts and components. However, as far as the current research status of this book is concerned, it is mainly a brief analysis of the shape of the characters, citing individual glyphs to explain the problem, or lack of comprehensive and systematic research. Therefore, this article is based on previous scholars' researches, taking the inscriptions’ glyphs received in Li Yun as the main research object. Based on the ways in which the components evolve, this work compares these inscriptions’ glyphs with the seal scripts’ glyphs of Shuo Wen Jie Zi, and conducts a relatively systematic study of the character shape and organization system of Li Yun. There are five parts in the full text. In addition to the ‘Introduction’ of the first part and the ‘Conclusion’ of the second part, the remaining three parts are the main research contents. The second part is the study of the book, the version and style of Li Yun, and the presentation of research status and research ideas related to the research objects. The third part is to divide the evolution of the forms in the Li Yun into five types, to reclassify each type of glyph evolution for example analysis, and to briefly summarize the characteristics of each evolution type reflected in the book. The fourth part is mainly an overview of the analysis of the causes of the five types’ features and the evolution of the fonts. This article will also be accompanied by a full-text version of Li Yun. To have a clearer understanding and application of the classification description in the article, this article also shows a spreadsheet of all the glyphs of the book in the appendix section.