Objectives The purpose of the study examines the effects of the behavioral activation system(BAS) and the be-havioral inhibition system(BIS) on social network service(SNS) addiction proneness, the mediation effect of SNS use motives, and the moderated mediation effect of self-control and distress tolerance in the link between BAS, BIS, SNS use motives, and SNS addiction proneness. Methods BAS, BIS, SNS use motives, self-control, distress tolerance, and SNS addiction proneness of 342 adults were measured online. Results First, BAS and BIS predicted SNS addiction proneness. Second, positive reinforcement motives mediated the relationship between BAS and SNS addiction proneness, and negative reinforcement motives mediated the relationship between BIS and SNS addiction proneness. Third, self-control moderated the mediation effect of positive reinforcement motives between BAS and SNS proneness among passive users. Fourth, distress tolerance moderated the path from negative reinforcement motives to SNS addiction proneness in the mediation model. Conclusions These results expanded the understanding of the effect of the organic and motivational factors on SNS addiction proneness, and suggested that distress tolerance could have a significant role in reducing the effect of BIS on SNS addiction proneness.