The purpose of this study was to identify the effects of foreign language learning strategy training on strategy use and language achievement. Using the nonequivalent control group pretest-posttest design, 92 subjects (48 male, 44 female) were divided into two groups, one being the control group andthe other being the experimental group. Oxford\'s Strategy Inventory for Language Learning (SILL) was administered. For language achievement, The researcher made the achievement test material and got the content validity by three coworkers. The training was executed during 8 weeks of regular classes - 4 classes a week- by the researcher, and the training program was planned by the researcher. After the training the subjects were asked to answer the SILLand to take tests about vocabulary, listening, and reading. The results of this study through ANCOVA were as follows: 1) Foreign language learning strategy training could improve the use of strategies and achievement in vocabulary, listening, and reading. 2) The training could not improve achievement in overall English, tested for the whole area including speaking, writing and grammar. In conclusion, language learning strategy is related to achievement in language, And the strategy training can improve strategy use and also language achievement. Therefore I would suggest that people who want to improve their English need to learn foreign language learning strategies. Teachers can also teach foreign language learning strategy to help unsuccessful learners in school.