The purpose of this study is to examine the experience and attitude of Korean learners about using online machine translation tools. To accomplish this goal, 99 Korean learners of elementary and intermediate level were surveyed and their results were analyzed by each item. As a result, most Korean learners have experienced using machine translation tools in Korean language learning, and have found that a large part of Korean language learning relies on the use of machine translation tools. However, it was still recognized that the use of machine translation tools was an auxiliary means of Korean language learning. For some items, there was a difference in response outcome by proficiency. There was a significant difference between the types of machine translation tools used, the purpose of using machine translation tools, and the degree of dependence on machine translation tools. The results of this study showed that Korean learners have some experience and awareness about online machine translation tool. Also, we could see how these experiences and attitude differ according to learners’ level. This study has significance in that it is the first attempt as a specific research study on this field.(Hongik University)