Diabetes mellitus is not only influenced by various environmental factors but also dietary factors. In addition, it has been reported that the prevalence of hypertension or cardiovascular diseases is increased as the duration of diabetes increases. Recently, the government has been emphasizing the reduction of sodium intake to prevent hypertension or cardiovascular diseases. Although various types of studies have been conducted to find out the relationship between sodium intake and hypertension and various diseases, it is impossible for individual researchers to perform a large-scale study for the whole population. Thus, KNHANHES data can be considered as a tool for individual researchers to conduct a nation-level study to understand the relationship between disease and dietary intake. The KNHANES survey has been conducted since 1995, and its content has been supplemented every year. To measure dietary intakes of diabetic patients using KNHANES data, one can use health examination data and dietary survey data. That is, the presence of diabetes can be identified through health examination data, and then the nutrient intake including sodium can be figured out using 24-hour dietary survey data, and the intake per food can also be checked. However in KNHANES data, because samples are extracted using stratified sampling method, the analysis using general statistical methods is not appropriate and thus should use statistical packages for stratified sample analysis of SAS, SPSS, and STATA or use SUDAAN, a statistical program for stratified sampling data analysis. In domestic and foreign presentations related to diabetes using KNHANES data, most of them are about the tendency of diabetes prevalence and the quality of life, and studies related to dietary factors are few. Among studies on diabetes and dietary factors, a study on the relationship between glycemic index, glycemic load and carbohydrate intake and diabetes prevalence rate showed that dietary glycemic index and dietary glycemic load did not affect the diabetes incidence in men but the risk for diabetes incidence was 2.34 times (Crude OR, 95% CI : 1.34-04.06) increased when the dietary glycemic load was over 260.5 in women. There is no study on the relationship between sodium intake and diabetes incidence using KNHANES data. Since diabetes related studies using KNHANES data has not been sufficiently conducted currently, it is hoped that various studies on the relationship between diabetes and dietary factors and the risk for the incidence of other diseases can be conducted by many investigators in the future.