The purpose of grammar education research is to study the education of language root. As theoretical research has been studied along with practical research, their works are examined through published books and doctoral thesis. They also suggest duties that grammar education research must improve on for further research. Some of the most representative books for grammar education were written by Kim Kwanghae’s Education Theory of Korean Knowledge (1997), and Lee Kwankyu’s Education Theory of School Grammar (2008). Meanwhile, other books struggled to focus on grammar education entirely and/or separately in sole part. Nonetheless, two previously mentioned books still have flaws in complete focus on grammar education research. Overseas books have been greatly influencing the field, especially on systemic functional linguistics, cognitive linguistics, and ecological linguistics, etc.. 56 doctoral thesis have been published for grammar education: 22 from Seoul National University, 9 from Korea National University of Education, 7 from Korea University, 5 from Pusan University, 4 from Kyungpook National University, and 2 from Dongguk University. If we see the process of education, ‘content’ was studied the most by 33.9% and ‘education method’ was researched by 21.4%, while the ‘goal’ and ‘evaluation’ sections were studied only once for each. The remaining percentage, 41.4%, focused on the integrated subjects. Depending on the subject of study, thesis topic varies from ‘vocabulary’ (19.6%), ‘discourse’ (10.7%), ‘sentence’ (8.9%), ‘attitude’ (8.9%), and integrated subjects (35.7%). It is, though, distinct that ‘phoneme’ has never been researched and only 2 thesis on ‘language norms,’ which are the closest to the Korean language in lifestyle, are written. However, practical research field still needs theoretical part. Grammar education research requires consistent and intense studies based on both theoretical and practical research. Theories related to grammar education must receive more support for various studies such as systemic functional linguistics, cognitive linguistics, and critical discourse analysis, etc.. Grammar education research covers all basic language features; therefore, the research needs to be studied more with language-related studies as well as other academic fields.