Caodaism is one of big religions in Vietnam with more than 1 million religious people, accounted for 1.01% of national population.

Caodaism has a very short history of foundation in comparison with others religions in Vietnam. It was official founded in Tay Ninh Province in 1926. Caodaism was formed on the base of Buddhism, Taoism and Confucianism. People in Caodaism worship three teachings (Buddha, Saint and Sage) as well as their ancestor. They believe in cycle of eternal change and believe that they can get out of that cycle if they do right things (such as helping the others, not killing animals, etc.)