In the second issue of literary review in 2021, Cao Libo proposed that the method of "mutual verification between literature and history" has had an important impact on the study of literature and history in recent 100 years. There is the accumulation of Mencius's theory of "knowing people and discussing the world" and Aristotle's concept of poetics, as well as the inheritance of "simple learning" in the Qing Dynasty and the spread of Western learning to the east of "experimentalism" method. Hu Shi's textual research on novels such as the romance of the Three Kingdoms with the method of "mutual verification of literature and history" is not controversial, but the influence of textual research on Redology is relatively complex. The original intention of Hu Shi's textual research on a dream of Red Mansions in 1921 was to emphasize the "scientific method", but it led to the tortuous road of the Centennial Redology of seeking hidden - textual research - New seeking hidden. The compatibility of scientific methods and literariness, the systematic observation of the author's family and the people in a dream of Red Mansions, and the overall planning of the virtual and real relationship between general reality (National Memory) and personality reality (family memory) should be a feasible way out of the dilemma. Try to give consideration to the space-time dimension from ancient to modern to future, from domestic to overseas, explore the interaction between poetry and history in the new era, and provide reference cases for the interpretation and inheritance of classics.