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Objectives: This study evaluates wireless IT-based self-management services for type 2 diabetes mellitus (T2DM) patients. Methods: Patients diagnosed with diabetes mellitus (DM) and undergoing treatment at a local healthcare institution, and those who participated in community hypertension and diabetes registration and management services and capable of using the internet or a smartphone were enrolled in the study. About 320 patients who had completed a questionnaire and provided anthropometric data and baseline blood tests at the end of the 12-month study period were assessed. Results: In the IT group, a significant improvement was observed in fasting blood sugar (FBS) awareness and self-monitoring blood glucose (SMBG) levels at both baseline and end of the 12-month period. Knowledge scores improved in the human support and IT service groups, and FBS and hemoglobin A1c (HbA1c) decreased significantly in all the groups. In the change in the HbA1c control rate at baseline and 12 months in the three groups, the difference in the IT service group was 13.8% (p=0.0035). Conclusions: Adding IT-based services to the existing management services for DM patients may help in controlling FBS and HbA1c levels by enhancing blood glucose measurement and management.