That tracing back to the theoretical and practical starting point of folkloristics,which is the overall rationality of human beings,and then deducing the theoretical research paradigm and practical research paradigm of folkloristics by the dual integration and restoration of the history and logic of the connection between folkloristics’contingent knowledge genealogy and the inevitability concept,is not only the basic issue that folkloristics in China should pay attention to,but also the common responsibility that all countries in the world should undertake to reconstruct the ideals of folkloristics.