Even though Korean relative honorific expressions have gone through a lot in terms of systemic change in real life, the relative honorific speech level has followed the system which set up by Korean linguistics in the early of 20th century as before without any modification. Korean relative honorific system and construction should be based on the theory of Korean linguistics with consideration of Korean Speaker’s realization and awareness. Moreover the research of Korean relative honorific system for Korean education has to seek the explanatory to Korean normal speakers and provide comprehensible contents to Korean language learners of as the first and second language. This paper suggests that the relative honorific speech level is realized in mono system as a basic relative honorific system. This is from the idea that it is not realistic that there is four kinds of classes of formal style and two kinds of classes of informal style in dual system of the relative honorific speech level. The formality of utterance commonly depends on tone and involves the intervention elements of utterance manner. Hence, the dual system of the relative honorific speech level is not meaningful. This paper tries to set up the relative honorific speech level from ‘Hashipsio, Haseyo, Heyyo, Hey, and Heyla style’ according the degree of honorification and presents the retrospectives form of them by each. This is through reformulating the former researches and taking the frequency of use in real life. To educate Korean as the first and second language, this paper also suggest that ‘Hao-style’ and ‘Hagye-style’ are excluded from the basic system but handled in enrichment program.