Öz Abstract: Today, more than ever before, the changing global climate is defined as a new, direct and multifaceted issue threatening the national security of all countries. Considering the effects of climate change, especially through extreme weather events, the situation seems quite serious. The future of humankind and our planet may be in jeopardy due to it. Thunders, droughts, forest fires and floods have caused environmental impairments and longer-lasting drought not recycled and this situation has adversely affected the food, water and sanitation security of millions of people and mass migration has happened for more than a decade. The worst and devastating effects of these problems that are belonged to largely the responsibility of developed countries, mostly are seen, or will see, developing countries which have scarce natural resources and limited facilities to adapt to these challenges caused by climate change. They are state’s most costly and destructive natural disaster. Conversely, there are possibility which the problems created by climate change can lead to conflicts and tensions among the states and communities, especially on the world’s most unstable regions, as well as threatening economic and political stability, that is, peace and tranquility.This study is both to emphasize the close relationship between energy and climate security and put clearly forward to what extend does national security affect by climate change. Both policies are carried out over the world together. The U.S. climate security politics based on energy demand, in this framework, is to discussed and analyzed on this basis of at present in this study.Keywords: Climate Change, Energy Security, the U.S.