In this dissertation I have interest in the personality classification in order to recognize the personlity classification in order to recognize the tenfency of the mentality and the action. This paper compare the temperament of Sasangin(四象人) by Lee Je Ma(李濟馬) and The Psychological Types of C. G. Jung. As a result I get the following conclusions:1. Sasang understood that Sassangin have original tendency of the mentality. But C. G. Jung understood man has all of the four psychological type though they have discrepancy among them.2. In the function of the mentality, the both are similar.3. The mentality of So-Eum-In(少陰人) is similar to The Type of Thinking. The mentality of So-Yang-In(少陽人) is simliar to The Type of Feeling. The mentality of Tae-Eum-In(太陰人) is similar to The Type of Sensation. The mentality of Tae-Yang-In(太陽人) is similar to The Type of Intuition.4. The tendency of the mentality by the personality classification is of some use in the oriental medical therapy.5. For using the tendency of the mentality in oriental medical psychotherapy, they require more studies.