According to a method for providing a Sasang constitutional type identifying service using a fortune and energy, presented in the present invention, a fortune and energy value is detected on the basisof information on the date of birth received from a user, the order of strength and weakness of the Five Elements is determined by using the corresponding fortune and energy value, and the strength and the weakness of the five viscera are determined on the basis of the determined order of strength and weakness of the Five Elements so as to identify Sasang constitutional types, such that the user's Sasang constitutional type can be more simply checked by the user through the user's date of birth even without the help of an expert.