Anam Nikaya (Annamese sect) is a school of Mahayana Buddhism adhered to by Vietnamese living in Thailand, who form an ethnic group closely related to Thai society called “Yuan” by the Thais. The Yuan, or Vietnamese, have been immigrating to Thailand at least since the Ayutthaya period. Their community became established in many areas of Bangkok, the most important of which is “Yuan Saphan Khao” (Yuan at White Bridge) in Bangkok’s Dusit district, where Anam Nikaya teachings have been practiced for a long time. The early Vietnamese here were close to the royal Thai court, especially during the reign of King Mongkut or King Rama IV. (Limpasut Pussadee.1976: 51-52).When the King had been a monk at Rachathiwat Temple, he got to know them well. On his ascension to the throne, he invited Vietnamese monks to perform the ceremony on the coronation and then, did the first “Kong Teck” ritual (funeral ceremony) for his late queen. In establishing their community on the bank of Phadung Krungkasem Canal, the Yuan (Vietnamese) built Wat Yuan Saphan Khao (White Bridge Vietnamese Temple) as their community center, to which King Mongkut gave the formal name “Wat Samanam Borihan.”( Chompoohom Krissana. 2003: 24) For all these reasons the area surrounding Wat Yuan Saphan Khao is considered to be culturally important and a major center of Vietnamese culture, uniting Anam Nikaya Buddhists and reinforcing the Vietnamese identity expressed in their traditions and customs, including important religious practices. However, current globalization affects behavior, values and social influence towards people in Thailand which rapidly affect the identity of the Vietnamese community.