The embodiment of invention discloses a method for detecting blood sugar and an implanting device. The method comprises the steps that the implanting device determines if the current time falls into anyone of N preset time zones, wherein the N is a positive integer; if the answer is affirmative, the implanting device checks the blood sugar to obtain the blood sugar concentration information; the implanting device sends the blood sugar concentration information to mobile terminals. The method for detecting blood sugar and the implanting device can automatically test the blood sugar concentration.