Han, sung-il. 2003. A Study on the Use of Online Communication Language Using Questionnaire Survey. The Sociolinguistic Journal of Korea, 11(2). The objective is to investigate chatting rooms and the current state of the use of communication language on the internet using a questionnaire survey. Important findings among the questionnaire results can be summarized as follows. ① University students use less swears or slangs than middle or high school students. This means that middle and high school students use swears or slangs as a popular language, and they do not control themselves in using them as they grow up. ② Problems in computer chatting conversation, i.e., 'destruction of our language', 'use of swears or slangs', as well as 'meaningless conversation' or 'rough conversation' were pointed out. ③ When chatters used their real names, they used much less lying, exaggeration, swearing, etc., but still did not try to speak properly observing the language standard. ④ The younger chatters are, the more they use communication language as the popular language. ⑤ The reason why chatters use communication language might be understood as a kind of 'language selection' to adapt to the communication environment as well as to a principle of economic efficiency and expression. Therefore, communication language has to be accepted as a social dialect and education as to its efficient and proper use is needed.