All blood glucose meters on the market are relatively accurate, but there can be errors if the measurement method is inaccurate. Blood glucose meters are convenient and quick to measure blood glucose, and are suitable for diabetic patients to monitor blood glucose at home, so as to facilitate the timely adjustment of glucose-lowering program. Currently on the market blood glucose meter, such as Roche blood glucose meter, Johnson blood glucose meter, steady ho blood glucose meter accuracy is relatively high, the principle of measuring blood glucose is similar. If the blood glucose is not measured according to the standard method, the result will also be inaccurate. It is recommended that patients follow the operating instructions of the blood glucose meter: choose a suitable operating temperature environment; before blood collection, rub or massage the blood collection site. The best place to collect blood is on the side of the finger; sterilize the blood collection site with 75% alcohol; the arm on the side of the blood collection can be naturally lowered to facilitate the collection of sufficient blood samples. Therefore, in order to minimize errors when measuring blood glucose with a blood glucose meter, it is important to know how to use the meter correctly.