The objective of this study is to investigate the effects of dietary nutrient intakes for markers of blood glucose and inflammation which is important to the progress of type 2 diabetes and the development of its complications. For this study, 76 adults with diabetes (42 males, 34 females) were recruited from a group of patients who had visited the department of endocrine medicine. Data on anthropometric characteristics, clinical indices such as hemoglobin A1c (HbA1c) and C-reactive protein (CRP), and dietary nutrient intakes were collected. Our results have shown that 66% of subjects were either overweight or obese. Serum analysis indicates that levels of C-peptide, glucose, HbA1c, CRP, triglyceride, LDL-cholesterol were higher than normal range. Results from the dietary nutrient intake survey displayed that intakes of cholesterol and sodium were higher than Dietary Reference Intakes for Koreans. On the contrary, folate intake was lower than the guideline. Within the females, energy contribution from carbohydrate was higher than Korean Diabetes Association guideline. Statistical analysis has revealed a negative correlation between serum HbA1c level and dietary intakes of polyunsaturated fatty acid (PUFA), n-3 PUFA, ${eta}$-carotene and vitamin E after adjustments for age, BMI, smoking habits, alcohol consumption, exercise and ingestion of diabetes mellitus medication (p<0.05). Serum CRP level was inversely associated with dietary intakes of carbohydrate, protein, vitamin C and fiber (p<0.05). Our results suggest that dietary nutrient intakes may influence the levels of HbA1c and CRP, and subsequently, it may help in the management/treatment of type 2 diabetes.