Purposes of this paper are to announce name and contents of grammar subject diachronically and synchronically and to suggest proper name of the subject. Since the Enlightenment period, grammar subjects had been various names such as ‘Grammar, Malbon, Munjeon, Eojeon’, and so on. Afterwards, the name, ‘Grammar’ has been used steadily after 1979. Grammar subject has been including phoneme, word, and sentence traditionally; however, lately from 1996, text and language standards have been added, as well. Therefore, the proper name that suits such contents for grammar subject is ‘Grammar and Korean Language Life’. Recently since 2012, ‘Reading and Grammar’ subject has contained Korean history. It is ideal for students to learn both diachronic and synchronic Korean language for the elective subject, even though it may be possible in the reality. However, a required subject ‘Korean Language’ has omitted containing the history of Korean language in 2015 curriculum. This causes a big issue because the elective subject ‘Language(Grammar) and Media’ includes a Korean language history, while the required subject ‘Korean Language’ does not. I suggest that it is a valid method to add the Korean language history to the required subject ‘Korean Language’ and to exclude it from the elective to befit the name of ‘Grammar and Korean Language Life’.