Since the introduction of the 6th National Curriculum, English pronunciation teaching in Korea has geared toward fluency, less focusing on accuracy. Since then the two technical terms, accuracy and fluency, have been widely used in the EFL literature in Korea, but in a rather confusing way. This paper is an endeavor to clarify these two concepts in terms of the viewpoints of Phonetics and English Education. From the phonetic standpoint, I argued that accuracy is more closely related to 'clear speech,' whereas fluency is applicable to either 'clear speech' or 'casual speech'. I also suggested two methods for the evaluation of English speaking fluency: one is the evaluation of weak form pronunciation: the other, sentence stresses. From a viewpoint of English Education, I reviewed some relevant literature and found that (1) accuracy and fluency are related to language usage and language use, respectively; (2) accuracy and fluency have been used as terms applicable to all four language skills in language learning, rather than speaking skill only: (3) a definition of fluency needs to be modified for its flexible use in ESL/EFL classroom setting; (4) a number of recent textbooks on pronunciation teaching include lots of useful fluency enhancing practices. As a conclusion, I summed up afore-mentioned discussions and presented some suggestions for the National Curriculum in the future.