Abstract: Yinxu Shuqi Kaoshi, written by Luo Zhenyu, is the famous book verifying the inscriptions on bones or tortoises shells. In the book, Luo has discussed about 760 oracle-bone inscriptions through compared with bronze inscriptions. By making a comprehensive investigation on the book, we found that Luo applied such methods as confirming character components with individual character, confirming individual character with character components and researching the shell-and-bone inscriptions through the laws of the bronze inscriptions. It is noteworthy that Luo has also summarized some rules of ancient Chinese characters'evolution at the same time. He discussed differentiation, simplification, complication and erroneous transformation in the development of Chinese characters. He also traced back to the original word form and meaning. Thus, he corrected the mistakes of the previous.