雖然積極的血糖控制已被證實可以減少糖尿病的併發症，但是近幾年來糖尿病患者的血糖控制並沒有什麼進步。一般糖尿病患者的血糖自我監測次數都不足，而且由傳統的血糖機所獲得的血糖值是不連續的，所以根據這些數值作最適當的治療調整是困難的。但是，經由連續的血糖監測，就可以辨識出血糖值的高低峰程度及整個血糖值變化的趨勢，這是個別的或分時段性的血糖測量所無法得到的結果。我們報告三個不同臨床狀況下，使用連續血糖監測系統的經驗；也對現今探討連續血糖監測系統使用狀況的文章作文獻整理。使用連續血糖監測系統的適應症還包括特殊狀況，如妊娠糖尿病，因為在這時期，光靠檢查醣化血色素，是無法看出血糖值高低波動的。由連續血糖監測系統所得到的血糖值資料，在改善糖尿病患者的治療結果及生活品質方面是非常有價值的，它也可以讓患者更了解糖尿病。

Although tight control of blood sugar has been shown to reduce the complications of diabetes, there has been little improvement in the glycemic control of diabetic patients in the recent years. Patients in general do not practice self-monitoring of blood glucose sufficiently. Moreover, it is difficult to optimally tailor treatment measures in accordance to the discrete blood sugar readings acquired with the conventional glucometers. With continuous glucose measurements, however, it is possible to identify the glycemic excursions and obtain the general pattern of glucose levels, which is not achievable with discrete, periodic glucose measurements. We presented our experience with CGMS (continuous glucose monitoring system) in three different clinical scenarios. We also reviewed the current literature that discussed the utility of CGMS. The indications for CGMS include special situations such as pregnancy, for which the HbA1C may not reflect the wide fluctuations in blood glucose levels. The information provided by CGMS can be invaluable for improving the treatment and the quality of life of diabetic patients. It may also increase their understanding of diabetes.