Style As the conception of human underwent significant change during the renaissance era, the theory of human proportions gained great importance among the artists and art theorists of the time. The renaissance artists put considerable effort on finding and presenting an ideal model for human body proportions that could represent the newly founded status of the human being in their time. However, Leon Batista Alberti, among these artists and theorists, had sought a different objective. Contrary to what some art historians believe, he was critical of the break, which he thought that was caused by his contemporaries’ insistence on presenting an ideal image of the human body, from the natural human. Therefore, by using precise instruments and empirical methods besides his especial theoretical approach to nature, Alberti attempted to present a system of human proportions that would lead to a real, and at the same time ideal, portrayal of the human body. This paper aims to provide a complete picture of Alberti’s theory of nature and beauty by reviewing his written works and then explaining his practical methods and solutions to obtain body proportions according to his theoretical achievements.