This thesis is based on the analysis of the changing process from Ming 名 to Zi字, which are the ways of denomination in Ancient China. The concept of Ming included the linguistic theory of Mozi墨子 and Gongsunlongzi公孫龍子 in Pre-Qin先秦 period, whereas the concept of Zi established the theory of Chinese characters in Han漢 dynasty. I insist that Ming and Zi had sufficient affiliations through the debates and theories during the centuries, even though they had own different bases respectively. The main objectives of this research are: examining the meaning of Ming, and linking processes of Xunzi荀子’s theory through ‘文 Wen’ and ‘象Xiang’; and clarifying the principles of Zi behind the formation of polysemous characters through a classification method called ‘類lei’. At first, we focus on criticizing the explanation of Duanyucai段玉裁 on the meanings of Ming and Zi, through which we confused the exact concepts of them. After that we further research into the differences and relations between them. It is largely composed of three steps. The first is studying the establishment of the Ming theory by looking into texts of Mozi, Gongsunlongzi and Xunzi. The second is studying its alternation after the succession of Xunzi by investigating the usages of Wen and Xiang. Lastly, the thesis focuses on the Zi theory by further explaining about formation of Xingxiang形象 principles in Han dynasty.