Huiyuanyinyi in the Goryeo Collection quotes 89 entries from the Erya and is of great value in research. This paper applies the combination of documentation study and linguistics, quantitative and qualitative analyses, and comparative summaries to explore in depth the form, content, and characteristics of Huiyuan’s quotations from Erya, and to provide detailed illustrations. The study reveals that the form of quotation is diverse, and there are both similarities and differences in content with the present-day version of Erya, with the differences covering cases of heterogeneity, quotation of meaning, and misinterpretation, etc. The purpose of quotation is mainly to explain the meanings of terms, and most of the quotations are focused on the interpretation of common words and phrases. These research results help to deepen the understanding of Huiyuanyinyi and Erya, and provide references for research in related fields.