The tradition of yigu (suspecting the ancient) has a long history, especially apparent and intense in the Qing dynasty (1644-1912). This is closely related to the changing methods of scholarly research of the Qing dynasty itself. Early Qing saw the introspection of Neo-Confucianism of the late Ming dynasty (1368-1644), and into the mid-Qing appeared Han-classical textual research, finally to the late Qing revived the New Textual scholarship on Confucianism. Essentially throughout the Qing dynasty scholarly climate showed distinct characteristics of "contradiction" and "conflict." From a scholarly history perspective, this paper examines the traces of development and maturity of Han-classical textual research from early to mid-Qing, and the evolution of the New Textual scholarship of the late Qing. It aims to probe and clarify the evolution and influences of the concept of "suspecting the ancient" during the Qing dynasty.