This Articles probes the propagation history of Nichirenshoshu in Taiwan and its main religious ideas. During the period before Nichirenshoshu broke off with Soka Gakkai, the later was responsible for overseas missionary work, the case in Taiwan included. About 1961, the members of "Nichirenshoshu"(Soka Gakkai) began to preach in this island. At that time, Taiwan was a district under material law, and this Japanese religion, regarded as an illegal sect, was prohibited. After the material law was abolished, Soka Gakkai set up units responsible for religious and cultural affairs in Taiwan to promote the works of preaching teachings, cultural undertakings, and international exchanges. After Nichirenshoshu broke with Soka Gakkai in 1991, priests sent to Taiwan by the head-monastery in Japan were in charge of missionary work, and established monasteries. The main religious conceptions of Nichirenshoshu include: The Lotus Sutra is the highest canon and should not be mixed with other texts. The three mysteries are the objects of the worship system of this Buddhist school. The "Great Gohonzo", a mandala depicted by Nichiren with Chinese characters, is the representation of Original Buddha. The place where the "Great Gohonzo" installed is called the original platform for religious disciplines. The title of the Lotus Sutra conceives all truths, so the chanting of its title becomes the key practice. This school has a special conception of three jewels, its followers regard Nichiren, who is thought to be the incarnation of Bodhisattva Visista-Caritra in the Lotus Sutra, as the jewel of Buddha; the true Law represented by the Great Gohonzo the jewel of dharma; Nikko and the priests in his lineage the jewel of samgha. In order to accommodate with the open religious environment of modern world, this school has attached importance to a preaching method through which the believers' welfare is claimed. Besides, its criticisms of other religions are not so fierce as before.