Considering to some eminent literary works, declare a severe relevance between psychoanalysis and writer’s method. The Great Gastby, F. Scott Fitzgerald classic twentieth century story of Jay Gatsby’s quest for Daisy Buchanan is different from other American Writer’s which also describe the corruption along with failure of the American Dream. Psychology is an academic and applied discipline that involves the scientific study of mental functions and behaviors. Psychologists attempt to understand the role of mental functions in individual and social behavior. This study is mainly concerned with the psychological method of writing in the Great Gatsby. Attempt to understand the role of Gatsby’s mental functions in individual and social behavior. Practically it is an analysis of wealth, power and lust in some segments of the story. Notifying how mush wealth can help to obtain the power and how much the power can help to obtain the lust. The root of someone’s motivations to create a evolution in spites of having a appropriate life situation. And associate the story with psychological points by some psychologists theories.