Abstract: The use of continuous glucose monitoring (CGM) technology to monitor real-time glucose levels can help to achieve better blood glucose management and more precise glucose control.Consequently, time in range (TIR) derived from CGM data has emerged as a novel standard for assessing blood glucose control and improvement.TIR has progressively been integrated into domestic and foreign guidelines for diabetes prevention and control in recent years.It provides comprehensive and detailed insights into blood glucose, encompassing hyperglycemia, hypoglycemia, and glucose fluctuations.Moreover, it complements traditional indicators like glycated hemoglobin, providing a more accurate reflection of glycemic control and the risk of diabetic complications.This article reviews the application and development of CGM technology in diabetes management, and explores the implications and clinical utility of the new blood glucose assessment indicator TIR in empowering diabetes management, aiming to offer insights for further optimization of glycemic control in diabetic patients.