Korea's soybean export volume is extremely low, while the import, highly concentrated in the United States, Brazil, China and other countries, has been maintained at a high level for a long time. What is the impact of this imbalance on the food security level of the Korean soybean industry. In this paper, two types of indicators, international competitiveness and industrial control, are selected to reflect the food security level of the soybean industry. Its soybean industry, between 1998 and 2019, is quantified and analyzed by setting alarm limits for the food security level of the soybean industry, using the mapping method to calculate the food security level scores of each indicator of the soybean industry security. Then weighting the comprehensive index of food security level in the soybean industry. The results show that the food security level of the soybean industry in Korea has been in a state of crisis since 1998, and the composite index of security level has been above 98 in most years, except for some years. Comparative analysis with Japan, which rolled out food security policies 10 years earlier than South Korea, offered further improvement solutions：(1) Expand soybean planting area and enhance food security；(2) Increase soybean productivity per unit area and double soybean industrial R&D investment；(3) Shift the government and the public's understanding of food security.