Dated back in the 1980s, researchers in second/foreign language learningbegan to shift their attention from teacher-centered area to learner-centered area.It was not until then that learning was claimed to be as significant as teaching insecond language learning. It was assumed that good teaching should include theways to learn, to remember, to process information, and to become moremotivated (Weinstein & Mayer, 1986). Language learners’ learning strategieshave become a major discussed issue in relation to second/foreign languagelearning since then. During the past three decades, attempts in defining languagelearning strategies (LLS), classifying LLS, finding the relationship betweenlearners’ personal factors and their LLS choices, and studying the significance ofindividual LLS (e.g. metacognitive strategy, listening strategies, etc.) havesubstantiated the empirical studies in LLS.This study aims to provide a literature review on LLS from variousperspectives-- the definition of LLS, the classification of LLS, findings of therelationship between personal factors and LLS choice, and the training in LLS.