Recently there are some religious controversies in Taiwan. Some are resolved by juridical judgments. The government drafts “Religious Group Law” and submits it to the Legislative Yuan to be scrutinized. There is no idea about religious freedom in Taiwan. And the law about religious affairs is out of date. How to regulate new religious groups by law becomes an important issue. There is much to be learned in respect to how to regulate new religious groups by Taiwan from many other countries. The author discusses the definition of new religion at first and then introduces the laws about new religions of five countries.