The cause of the change in religions in Vietnam is due to the impact of the process of changing awareness, policies and ways of economic development and social management of different levels of government. In which, the direct factors are changes in economic, social, cultural and living conditions brought about by the process of industrialization, modernization, integration and globalization. This change has given rise to pressing social problems. Besides, the strong impact of people’s intellectual standards and media; taking advantage of the freedom of religion and belief of organizations and individuals at home and abroad; … are also important factors for the emergence and development of new religious phenomena in Vietnam.