The purpose of this study is to empirically examine whether there are differences among Korea, Japan, and the United States in the content of internal control systems utilized by firms. By analyzing the relationships among corporate competitiveness, corporate value activities, and internal control systems, management indicators for internal control systems were extracted. For the extracted management indicators, this study selected the provision of relevant information, frequency of provision, and types of information as observed variables and investigated whether there are differences by country. The results obtained through surveys of Korean, Japanese, and American firms revealed that, first, Japan and the United States are superior to Korea in utilizing target information and performance information, and the frequency of information provision is also ahead in the United States and Japan compared to Korea. In terms of information types, Japan and the United States were also found to appropriately utilize both physical and financial information better than Korea. Overall, Korea's internal control system is less efficient than those of Japan and the United States, and a restructuring of the internal control system is needed to enhance future competitiveness.