The role of motivation in language learning has been studied since the 1960s. It is indeed one of the most important areas of linguistics. This paper suggests strategies of motivating language learners and focuses on the role which motivation can play in language learning. The concept of motivation from different points of view is defined, a number of suggestions on how to motivate language learners are presented and the role of motivation based on various motivational theories are highlighted. With regard to the role of motivation in language learning, it is concluded that motivation plays an increasingly important role in many aspects, such as identifying with the target language society, achieving long-term and short-term goals, improving language learners' internal and external powers and exerting a group force. It also indicates that there should be more research areas to be examined and a long way is probably requlred to go in future theoretical and practical study.