According to an embodiment, disclosed is a blood sugar measuring device. The present invention includes: a glucose detecting part the concentration of glucose in body fluids of a user at a first measurement interval to determine blood sugar content of the user; and a control part changing the first measurement interval to a second measurement interval as an event occurs. The glucose detecting part detects the concentration of glucose in the body fluids at the changed second measurement interval. The control part determines the blood sugar content of the user based on the concentration of the glucose, detected at the changed second measurement interval.