Dynamic categorization refers to the immediate change or diachronic evolution of semantic categories at the lexical, sentence and discourse meaning levels under the influence of metaphor, metonymy, base/profile and other working mechanisms. From the perspective of "dynamic categorization" in cognitive linguistics, this paper analyzes the performance of dynamic categorization of word meaning in different dimensions of language, so as to make a reasonable interpretation of its derivations. It is found that, at the word meaning level, this categorization is all about lexical features and relations. At the sentence level, it is mainly about categorization of grammatical terms and the structural relationships. At the level of discourse, it is chiefly about the categorization of the evaluation meaning.