Abstract: Provided is a method of controlling liquid medication injection including: receiving, by an electronic device for controlling liquid medication injection, blood glucose values measured by a liquid medication injection device in which a liquid medication injection logic is programmed; generating, by the electronic device for controlling liquid medication injection, a blood glucose change pattern by using the blood glucose values over time; generating, by the electronic device for controlling liquid medication injection, a signal for changing the liquid medication injection logic taking into account a directivity of the change in the blood glucose value according to the blood glucose change pattern; and transmitting, by the electronic device for controlling liquid medication injection, the signal for changing the liquid medication injection logic to the liquid medication injection device.