Abstract: Current studies on the effect of L2 Motivational Self System(L2MSS) on college students' motivational behaviors are rare. A mixed qualitative and quantitative analysis with 162 college students from a mobile learning course called Youlinyouke was conducted to explore the influence of L2MSS on students' motivational behaviors and its difference from offline learning context. The results indicate that, on the one hand, the L2MSS in the mobile context has an effect on college students' motivational behaviors, with the L2 learning experience having a significant positive effect, the ideal L2 self having a moderate positive effect, and the ought-to L2 self having no effect; on the other hand, different from the effect in offline learning context, the function of learners' L2 ideal self on motivational behaviors is weakened but the effect of L2 learning experience is reinforced. A thorough grasp of the effect of the L2MSS of college students in the context of mobile learning has significant implications for promoting mobile English course design, mobile English teaching practice, and educational equality.

Key words: L2 Motivational Self System, mobile learning, motivational behaviors