This study aims to analyze research trends in the domain of air traffic control and identify significant issues and topics within the related literature. The data were collected from the Research Information Service System (RISS), and 297 Korean research papers containing the keyword "air traffic control" were analyzed using Textom. The main keywords were examined and visualized through frequency analysis and keyword network analysis, following a data refinement process. Additionally, CONCOR cluster analysis was conducted to assess keyword centrality. Research on air traffic control has been consistently ongoing since 1972, with a marked expansion in the 2010s. The term frequency (TF) analysis of the main keywords identified "air traffic control," "system," "flight," "aviation," and "airspace" as main keywords. The TF-IDF weighted analysis revealed that the main keywords were "system," "airspace," "air traffic control," "flight," and "UAV." Semantic network and CONCOR cluster analysis indicated that keywords with the highest degree centrality were "flight," "airspace," "air traffic control," "air traffic controller," and "plane." This study highlights the key topics related to air traffic control, as evidenced by the results of the keyword network analysis.