The investigators conducted a prospective, randomized, controlled trial in patients with type 2 diabetes for 12 weeks. The intervention group was treated with the new health care delivery system, where diabetes center provided specialized management, mediated by nurse of primary health care posts using the Internet and the PDA-type glucometer, while the control group with conventional health care. HbA1c, fasting plasma glucose and lipids levels were measured at baseline and follow-up.