Objective:To observe the glucose control of type 2 diabetics by continuous glucose monitoring system(CGMS) and evaluate the application of CGMS.Methods:Continuous glucose monitoring for 72 hours was carried out on Thirty-one type 2 diabetics.Glucose fluctuation and the relationship between CGMS glucose testing results and glucosemeter were analyzed.Results:CGMS discovered more hypoglycaemia and hyperglycosemia incidents.There was a good correlation between the glucose testing results of CGMS and glucosemeter.Conclusion:CGMS can comprehensively reflect the glucose fluctuation of type 2 diabetics and consequently provide more information for therapeutic adjustment.