The purpose of this paper is to provide a foundation and the solution for development of the language landscape by analyzing the publicly available language landscape data of the Yanbian Korean-Chinese Autonomous Prefecture, which shows the appearance of a multilingual society. Due to the recent change in the language policy of the Yanbian Korean-Chinese Autonomous Prefecture, the signage regulations have been newly changed, which is expected to have a great impact on the language landscape of the region as well as the usage pattern of the language. Therefore, the purpose of this paper is to secure comparative data with future changes by analyzing the language landscape at this point in time from various perspectives. The survey consisted of three regions, Yanji, Hunchun, and Helong, which differed in population distribution and economic development to some extent, and statistically analyzed the aspects of code selection and arrangement, and dealt with the language status, language norms, and translation issues that appeared in the combination of Korean and Chinese languages. Through regional contrast and analysis, the basis of the language landscape was revealed, and the direction of the development of the language landscape was suggested. This paper is expected to be used as an important material for historical sociolinguistic research and the establishment of national resident language policies.