This short paper analyzes the concepts of religion, mosque, and service. In the following line, we consistently pointed out the mosques which is described as Bayt-ullah/the house of Allah, are not only the praying place, at the same time they are the grounds for implementing some activities, public services that gains the grace of Allah. In this context, we called attention the concept of “imar” / public improvements mentioned in the verse of Qur’an (Tawba 17, 18, 19). This word can be translated as “to enliven”. As far as enliven concerned it is a main duty to all believers to make the mosques well populated, prosperous and decorative.