God Ra one of the ancient Egyptian Gods how was believed to rule all the world light and radiance. In later Egyptian dynastic times and for his historical status, Ra was merged with number of the major Egyptian Gods such as God Amon-Ra. and also during the Eighteenth Dynasty he reappeared in God Aten. What made Akhenaton during the sixth year of his reign to declare Ra as the only God for Egypt and the whole world. All of this coincided with the religious and political internal and external circumstances, an increase of the priests of Amon authorities and the loss of the Egyptian empire in Syria and Nubia. The research will introduce God Aten, his origin and name, religiously and linguistically. His appearance and development and his relationship with the God Ra. Then we move to his Oneness and his political role as well as his religious activity that was distinguished in construction of temples and the high status of his priests during the reign of Akhenaten.