Korean honorifics system is very well developed. It is divided into three categories, including subject Korean honorifics, object Korean honorifics and relative Korean honorifics. Firstly, this paper briefly introduced the three types of Korean honorifics, and then mainly investigated the most important part of Korean honorifics system-relative Korean honorifics. Besides, the paper researched the mistakes Chinese learners often made, comparing with Chinese honorifics. The paper may help Chinese learners to understand and master Korean honorifics much better and efficiently.