According to the studies in recent years in Turkey, it is observed that there is an increase in the number of people turning to deism and atheism. Many people whohave reached a certain level of prosperity and wealth have become reluctant to follow religious life and religious values over time and are reluctant to obey the rules and rules of religion. Many other see religious rules and rules as an obstacle to human freedom and want to live the world life more freely, without rules and without limits. This leads them to a way of life in which God is not involved. A thought in which God does not intervene and where the rules and rules of belief are determined by reason is found in deism. In the next step, there is atheism that does not include God in human life and thought. One wonder is whether there is a tendency towards deism in the perception of belief of secondary school students. In Turkey, the youth constitute a critical mass of deism and atheism occur secondary school students and is being questioned as to what the basis of the ratio of the state. The aim of this study is to determine the findings of deism and in religious understanding and perceptions of secondary school students. Summary Believing in a God or denying God is a fact that goes back to the early ages. As in the Western world, there have always been theist, deist or atheist currents in the Islamic world. The deist thought spreading in Europe was a rebellion against the Church’s opposition to dogmatic ideas and scientific developments. In addition, the clergy in Christianity due to the privilege of the clergy, the Pope is considered to be the representative of God on earth, such as thoughts that cause people to take a stand against Christianity. In addition, in the medieval Christian world, the pressures of the Church and the clergy on society, the monopoly of the religious domain completely, and the condemnation of the scientists who put forward scientific discovery and thought to death and torture led to the separation of the Europeans from Christianity and therefore religion. Over time, this has led to the spread of a secular worldview, a philosophically deistic thought, and an atheist philosophy in the sense that God is not involved in world life. In recent researches, it has been tried to put forward the perception of beliefs of Turks in the context of deism and atheism. Before the 2000’s Muslims can be expressed as a rate in Turkey was 99%. However, in recent years, it has been observed that this ratio has partially decreased and there are small changes in the belief preferences of Turks. I say deism axis in Turkey compared to the past, discussions and publications agenda more engaged. The Muslim population in Turkey at a tremendous rate that is Deism bring together a concern on the agenda of the society and particularly where young people are wondering what level of trends in this field. In a study conducted in 2013 by the Presidency of Religious Affairs and published in 2014, the rate of those who believe in the existence of God was determined to be 98.7%. In the study, the number of people who believe that Allah has revealed His commandments and prohibitions through the prophets has remained at 97.7%. Although there is a slight difference of 1% between those who believe in Allah and those who believe in the prophetic establishment, it is worth considering. Deism trend in today’s Turkey is almost no scientific research demonstrating that what size. The survey of some companies in Turkey deist in their research between the public rates are said to be around 6%. Although the accuracy of the results of these researches is approached with caution, the realities in the society we live in reveal that the research results cannot be ignored. It is difficult to say that the allegations in the media that young people, including conservative family children, turn to deism are based on serious scientific studies. In order to reach the correct information and results, it is necessary to conduct surveys on young people and to evaluate the obtained data according to scientific criteria. Therefore, in this study, it is aimed to determine the thoughts and tendencies of secondary school youth about the deism movement. The determination of the equivalence of deistic and atheistic discourses expressed in different platforms in recent years is an im-portant issue. It is known that dozens of websites opened under the name of deism and atheism operate on the internet and criticism of beliefs is intensified. Criticism towards beliefs is an important one for Islam and Muslims. The most important aspect of the problem is that young people are the most affected by the discourses on deism and atheism. The change and transformation in the belief structures of the younger generations are also closely related to the future of the country in which they live. In this respect, deism and atheism can be used to deter