Since the separation of Timor Leste from the unitary state of the Republic of Indonesia on May 20 2002, the religious conditions in Timor Leste have become interesting to discuss considering that currently Indonesia, through the Ministry of Religion, is actively promoting religious moderation to maintain the unity of the Unitary State of the Republic of Indonesia. What about Timor Leste, which used to be part of the unitary state of the Republic of Indonesia, with the number of Muslim people in Timor Leste 0.3% of the total population of Timor Leste, the majority of whom are Catholic. For the people of Timor Leste, the existence of the An Nur Foundation, which was founded by Muslim clerics in the city of Dili, is an institution that has long contributed greatly to expelling Portuguese colonialism. The existence of the An Nur Foundation in the field of education is also a symbol of religious moderation in the city of Dili where 95% of students are Catholic and the remaining 5% are Muslim as well as the teaching staff, the majority of whom are Catholic. The aim of this Community Service activity is to see directly and provide an understanding of the An Nur Foundation regarding the concept of religious moderation in maintaining national unity. This method of community service is carried out by means of direct outreach to the An Nur Foundation and the surrounding community. They asked how Indonesia could maintain unity with the various existing religions and cultures and Indonesian society in responding to these differences. An explanation was given to them that freedom of religion is guaranteed in the 45th Constitution. The role of the government is very necessary in implementing the regulations of the 45th Constitution, where one form of implementation is by establishing religious moderation in society in order to maintain national unity .