As the number of foreigners in the country increases, existing foreigner neighborhoods are spreading out. As the number of foreign residents increases, foreign crime seems to increase, but the foreign crime rate remains at a similar level. However, in areas where foreigners are concentrated, the top five violent crimes, illegal immigration, and drug-related crimes are increasing compared to those of Koreans, and it is necessary to prepare and operate security policy measures. In addition, the level of fear of crime is higher in the case of Koreans in areas with high concentration of foreigners compared to Koreans in areas with low concentration of foreigners, and it is necessary to continue research on this topic. Therefore, this study set up a research model based on disorder and social control factors, which are the main influencing factors that are related to crime fear in previous studies. This study aimed to test the moderating effects of formal social control and informal social control on the relationship between foreigners' and locals' perceptions of disorder and general crime fear in foreigner-dense areas. The results showed that the level of perceived social disorder influenced general crime fear among foreigners, and both physical disorder and social disorder influenced general crime fear among natives. Finally, the moderating effect of social control was found to be that for foreigners, formal social control moderated both social disorder and general fear of crime. Based on this, it can be seen that it is necessary to strengthen formal social control in areas where foreigners are concentrated and build a social system that allows informal social control to function properly. It is hoped that the results of this study will be used as a basis for the development of public security policies to resolve problems such as the increase in the number of foreigners in Korea and the fear of crime that may arise due to the continuous increase in the number of foreigners staying in Korea.