There are many scholars doing a lot of research on the study strategy of foreign language in our country. Through the investigation and analysis of the learning strategies adopted by postgraduates, Qin Xiaoqing (1998) found that we should attach importance to the application of postgraduate self-management strategies, and adjust and train the learning strategies of Postgraduates in order to adapt them to different language tasks. Wen Qiufang and Wang Lifei (2004b) think that the foreign language learning strategy system is complex and affected by various internal and external factors. The positive and negative effects of environment and learner factors on learning strategies are discussed. Wang Limei (2008) investigated the characteristics of English learning strategies of College Students under the network multimedia environment, and focused on the differences of strategies between high and low group students and their implications for strategy oriented teaching. Ni Qingquan (2010) explored the correlation between learning motivation, learning strategies and autonomous learning ability of college students in English learning process, and found that English learning motivation and learning strategies were highly positively correlated with autonomous learning ability, and the correlation between learning strategies and autonomous learning ability was stronger. The correlation between metacognitive strategies and autonomous learning ability is higher than that between other strategies and autonomous learning ability. Wen Qiufang and Wang Lifei (2004c) also put forward some problems worthy of study in the future of learning strategy research, one of which is the effectiveness of learning strategies, and whether the effectiveness of cognitive strategies must be based on the use of metacognitive strategies.