This study was to identify whether factors of personality test are distinguish each other in meanings, whether each test includes all possible factors of personality, whether one factor has only one meaning, then was to classify all possible factors of personality inclusively. This study scrutinized 3 personality tests and 3 classification systems of personality. The Test of Personality classifies factors of personality into eight-general activity, dominance, emotional stability, impulsiveness, masculinity, objectivity, reflectiveness, sociability. These eight can be reduced to seven. The Diagnostic Test of Personality classifies factors of personality into nine- dominance, emotional stability, impulsiveness, masculinity, reflectiveness, sociability, responsibility, conformity, superiority These eight can be reduced to seven. These can be reduced into eight. The MBTI classifies factors of personality into four-extraversion/introversion, sensing/intuition, thinking/feeling. judging/perceiving. These can be increasd to five. Guilford classifies factors of personality into ten-general activity, restraint, ascendance, sociability, emotional stability, objectivity, friendliness, thoughtfulness, personal relations, masculinity. These ten can be reduced to six. Cattell classifies factors of personality into sixteen-coldness/warmth, low intelligence/high intelligence, instability/stability, submissiveness/dominance, seriousness/impulsivity, expedience/ morality, timidity/boldness, tough-mindedness/tendermiedness, trusting/suspecting, practicality/ imagination, noivete/shrewdness, seif-confidence/guilt proneness, concervation/radicalism, group dependancy/self sufficiency, self-conflict/self-discipline, low tension/high tension, These sixteen can be reduced to nine. Muurray classifies factors of motives into twenty-abasement, achievement, affiliation, aggression, autonomy, counteraction, defiance, deference, dominance, exhibition, harmavoidance, infavoidance, nurturance, order, play, rejection, sentience, sex, succorance, understanding. These twenty can be reduced to eight. Reclassifying above-mentioned various factors of personality, human personality can be classified into thirteen-activity, dominance, stability, impulsiveness, masculinity, sociability, abstractness, independence, concervatism, morality, orderiness, openness, flexibility.