Disclosed is a personality trait prediction method and an apparatus thereof. The personality trait prediction method comprises the steps of: collecting a personal life log from a social network; analyzing the personal life log in a triple structure and defining an object with respect to each action of a user so as to generate a user action matrix and extract a user action variable; analyzing the personal life log to deduce a degree of interaction between the user and a friend of the user, and deducing a friend relationship property variable by using the deduced degree of interaction; analyzing the personal life log and using location information of the user with respect to each feed so as to deduce a movement route property variable; and applying the user action variable, the friend relationship property variable, and the movement route property variable to learned four personality trait models so as to predict personality traits.
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