Preservation and development of intangible cultural heritage are one of the burning problems in rich cultural countries. They are significant characteristics to express the substantial identity of a nation. At present, leading artificial intelligence (AI) into the cultural development strategy is a promising approach to introduce remarkable features to the world community, especially in tourism. However, detecting and discovering the festival knowledge at a local place in a country is not only an exciting problem for travelers but also a challenge for researchers and managers. We, therefore, propose a festival information preservation framework that applied AI techniques to seek and exploit the festival knowledge in Vietnam. We provide a Vietnamese festival lightweight ontology. We investigate and implement a practical application for identifying and mining the Vietnamese festival knowledge in Mekong Delta for the first work. Our initial approach concentrates on providing a Web application that classifies the snapshot and automatically answers questions.