In the modern world, volunteering in international conferences is becoming more and more popular. In 2014, APEC conference has gained huge public attention. This research focuses on motivation and job satisfaction of APEC volunteers, and aims to find motivation difference of different demographic groups, as well as the relationship between motivation and job satisfaction. The research uses quantitative questionnaire method, and has analyzed data using SPSS software by single-factor analysis and regression analysis. The research has found self-growth and social demand as the strongest motivation dimensions for APEC volunteers, demographic variation for overall motivation and motivation dimensions, positive relationship between motivation and job satisfaction, positive relationship between altruism dimension and job satisfaction. The research will be useful in future volunteering promotion, recruiting, selection, training and motivation of large national conference, competition, and exhibitions.