During these years, basketball is one of the most popular sports in Taiwan. The demand of basketball referees is much more with many extra games. It should be more rigid in the training of referees. The main study was in the importance and the reason of psychological skill to basketball referees. Two factors influenced basketball referees: the factor of society and personal psychology. The factors of society include the audience, media, family and job; the factors of personal psychology include self-confident, resist compression, concentration, interpersonal communication and professional attitude. These factors influenced referees performance in the game. There were three phases when basketball referees enforced the rules, which were doing the preparation of psychology before the game, getting with the game during the game, and were doing self-awareness after the game. Therefore, the factors above are hoping to be the experience treasured for the further skill. For the basketball referee’s cultivation, it should be emphasized on skill as well as metal level balanced, then can to promote the level of the basketball referee effectively.