This study aims to investigate the changes in the mutual recognition between Korea and China from the late 19th century to the early 20th century, and in the international relationship discerned from here. To discuss these topics, the methodologies of digital humanities based on linguistic big data are used. The objective materials that show the relation and the exchange between modern Korea and China suggest that there had been a constant connection. Based on the frequency and co-occurrence relationship of the term ‘China’ and ‘Jina’, the trend can be divided into three stages. The quarters are 1910 and 1920. Before 1910, the most co-occurred words of ‘China’ and ‘Jina’ were related to history, geography, and academics. After 1920, the most co-occurred words of that related to political and cultural movements in China. Co-occurred words of Japan was related to Japan's political situation and economic exploitation. The results of Chinese database analysis show the change in Korea-China relations since 1830. According to the annual frequency of ‘Joseon’, the trend can be divided into three periods. These three periods are characterized by the traditional regional order, the transition of the East Asian regional order, and the global nationalist and communist movements. Both of two result clearly shows the modern transformation of the regional order in East Asia. In short, the modern text big-data of Korea and China shows meaningful information about the mutual recognition of the two countries in modern era and the change in international relations behind them.