This research was conducted with the aim of: describing the FKUB work program as an effort to improve the quality of tolerance. Describe the obstacles in implementing the FKUB Work program. Describe efforts to overcome barriers and Describe the quality of tolerance among religious people in Kupang City. The method used in this research is qualitative methods are descriptive, data collection techniques in the form of interviews and document studies. The results of this study indicate that: 1) The role of the NTT FKUB in building religious tolerance in Kupang City was carried out with routine programs in the form of dialogue, seminars, socialization, speech competitions and hyme competitions and harmony marriages, non-routine programs in the form of book publishing, striker making , religious calendars and banners. 2) There are obstacles in the form of busy religious leaders, so the meeting has not run well, communication at meetings only occurs when there are meetings and limited facilities. The government and the community are not aware of the role of NTT FKUB. 3) conducted with discussions between the governing body, communication with the government, socialization, making proposals and saving funds in accordance with needs.4) Harmony in Kupang City runs well without any religious conflict due to the existing harmony in the city of Kupang is a legacy of the ancestors who continue to be guarded and developed to date.