The government of Abbassiyyah was memorable in history as it successfully brings to excellence Islamic civilization, during the ruling of Caliph Harun al-Rasyid and his son, al-Ma'mum. In that era, philosophy and science play a substantial role holistically under the framework of Islam. However, after that science activities were given less attention and further deteriorated. Among the factors that contribute to this are political instability, the lack of support from the government on science activities and others. That said, the science progress has not been impeded by religious activities or Islam in particular. The progress even exists to this very day. The Islamic science philosophy continues to be the focal point by its thinkers as a way to place Islamic science philosophy in its rightful place. Thus, this working paper carries two objectives. First of all, it seeks to identify the definition of philosophy of Islamic science and secondly, it intends to analyse the contemporary philosophical of Islamic science study trend. This library study reveals that the definition of philosophy Islamic science is more comprehensive than the modern counterpart. Apart from that, the discussion on it covers three substantial aspects-tawheed, al-Qur'an as main source, and ethics and value. All of these carry the purpose of ensuring that the philosophy of Islamic science stays relevant from time to time.