In 1970S, there were many publications applying T. Kuhn's idea of paradigm developed in The Structure of Scientific Revolution to the development of sociology. They are generally referred to in this article as "paradigmatic sociology". The purpose of this article intends to illustrate the limit of paradigmatic sociology in both theory and application. It is divided into five parts: the first part is an introduction regarding the rise of paradigmatic sociology and the second part illustrates its contents in accordance with three ideas (the application of social sciences, periodization, and pluralism). In the third part, this article attempts to show that all these three ideas constituting the contents of paradigmatic sociology are in fact outcomes of misunderstanding. Tending to explore reasons of this misunderstanding, in the fourth part we examine the sociological dimension of Kuhn's philosophy. Due to this examination, we are aware of the fact that a comprehensive understanding of the sociological dimension of Kuhn's philosophy can not be achieved unless the epistemological foundation is first addressed. By looking at the epistemological foundation, we conclude that, according to Kuhn, the sociological dimension of scientific knowledge refers not to knowledge of externalized definition based on theory and rules, but to knowledge of internalized understanding.