This paper attempts to analyze the “Gunjeong-dong Pildam(乾淨衕筆談)” and “Hangjeon Cheokdok(杭傳尺牘)” which are compiled into Hong Daeyong’s Books of Relaxed House(湛軒 書) in the 18th century from a rhetorical point of view. Hong Daeyong (1731-1783) was a scholar of the late Joseon Dynasty. This study began with an investigation of the circumstances in which Hong Daeyong met three Qing Dynasty scholars at Beijing, Gunjeong-dong(乾淨衕) and communicated with them through Sinitic Brushtalk(筆談, Pildam). Hong Daeyong kept exchanging letters with these scholars after finishing his tour in Beijing and entering Joseon in 1766. Considering Hong Daeyong’s writing style as expressed in these two materials, this paper introduces a possible method and methodology for analysis in Chapter 2, which uses Roman Jacobson’s communication theory and traditional Eastern literary theory as rhetorical theories for analyzing texts. The linguistic features and methods of the original text were examined from a rhetorical perspective in Chapter 3. Based on the results, it is judged that it was the main reason for them to communicate smoothly through the code ‘Chinese characters’ and have the common sense of acknowledging Confucian scriptures and traditional Eastern literature in a situation where they did not use the same oral language. Finally, this paper re-examined the significance of approaching these two materials from a rhetorical point of view based on the analysis results of the language expressions of “Gunjeong-dong Pildam” and “Hangjeon Cheokdok”. From a rhetorical perspective, it is hoped that this study will shed light on Hong Daeyong's writing style in the 18th century.