Abstract: Considerable research confirmed that extroversion plays an important part in the processing of positive emotions. In general, the relationship between extraversion and positive emotion includes: (1) extroverts experience more positive affects than less extroverted individuals in life settings; (2) extroverts react more strongly to positive stimuli; (3)it is possible that there is an attentional bias of extroverts for emotionally positive stimuli; (4)Amygdala and other structure activation for happy expressions correlate positively and significantly with the degree of extraversion. Along with the development of cognitive neuroscience, which aims to delineate mechanisms underlying brain-behavior interrelations, we can explore the relationship between extroversion and positive affects more accurately. This paper integrated numerous experimental results, analyzed the reasons for the conflicts, and proposed new directions of the future research in the relation between extroversion and positive affects

Key words: extroversion, positive emotion, attentional bias, ERP, fMR