Abstract: Self-determination theory (SDT) is a new cognitive theory of motivation. SDT maintains that motivation can be divided into autonomous motivation and controlled motivation. And these two motivations are not necessarily opposite dimensions but, rather, relate to each other in a quasi-simplex fashion. SDT also posits that there are five different types of motivation that vary according to their level of autonomy, which reflects the aspects of quality of motivation. A great number of studies show that autonomous motivation and controlled motivation have different effects, and autonomy supportive contexts are the most important factors proved to facilitate motivation internalization. Future studies should improve on the research methods, and be more conducted on the application studies. Besides, more studies based on the Chinese culture are needed

Key words: self-determination theory, autonomous -controlled motivation, autonomy support