This study is aimed to provide a scientific analysis of the fantasy genre that has entered literature as a new literary term. Every nation introduces a new term or a new literary genre into its literature, realizes its essence, and then tries to reconcile it with its culture. Fantasy as a literary genre today is incomparable with its place in world literature. In the study, fantasy is analyzed as the main fictional genre in the literature and its meaning with some scientific approaches. It also explores the characteristics of the fiction and fantasy genres that are still ongoing. Then it determines the relationship between them based on scientific considerations. Furthermore, it studies George R.R. Martin and his fantasy world created by him in saga “A Song of Ice and Fire”, and also its system of fantasy images and storylines. There are not only fan readers of George R.R. Martin in the USA, but also in the world. As brilliant examples of the fantasy genre in American literature, we analyze and present scientific analytical views to the novels in the famous saga "A Song of Ice and Fire"