This paper examines the contributions of linguistic typology to the study of the history of the Korean language and discusses how linguistic typology can further contribute to the field, based on recent trends in typological research. As research in the history of Korean has progressed towards identifying the causes of diachrony in the Korean language, contrastive linguistic methodologies, represented by linguistic typology and grammaticalization theory, have been introduced. These methodologies, through the concept of linguistic universals, have filled gaps in the data and made significant contributions to the study of Korean diachrony. However, concerns regarding theory-centric research in the history of the Korean language have not been absent. This paper highlights that recent research in linguistic typology and grammaticalization focuses on the specificity and regional characteristics of individual languages, obscured by the pursuit of universality, and argues for the necessity of conducting research that is centered around data in the study of the history of the Korean language. It emphasizes the importance of prioritizing data over theory, especially when they conflict. Moreover, the paper argues against indiscriminate contrastive studies led by superficial similarities and stresses the need to view linguistic systems in their entirety. By incorporating research based on primary data, it discusses how moving beyond merely applying the research findings of linguistic typology to the study of the history of the Korean language, the achievements in the study of the history of Korean can contribute to the fields of general linguistics and historical linguistics.