The purpose of this study was to develop and evaluate the blood glucose management (BGM) system, which supports the scheduling of blood glucose measurements for medical staff. This system enables medical staff to continually confirm the instructions of the physicians by measuring blood glucose levels using a smart device (iPod). This paper describes the difference in the delay of the measurement between the BGM system and the non-BGM system. For the iPod device in the BGM system, the desktop device, and the laptop device, the frequencies of a delay under 30 minutes were 94%, 67%, and 80%, respectively (Ryan-test, P < 0.01), and that over 30 minutes were 6%, 33%, and 20%, respectively (Ryan-test, P < 0.01). We concluded that the BGM system reduced the delay in blood glucose measurements and led to an optimization of the time of measurement.