Disclosed is a method for disinfecting a flow path in a water purifier by connecting a disinfecting device having a disinfecting module for supplying disinfecting water and a disinfecting device independently configured from a water purifier to the water purifier from the outside of the water purifier. A step of installing a sterilizing device connecting the inner flow path and the sterilizing device； A sterilizing water circulation step for sterilizing the sterilizing water from the sterilizing module to supply the sterilizing water to the water line inside the water purifier and circulating the sterilizing water； And a sterilizing water discharging step of discharging sterilizing water accommodated in a water purifier internal flow path to the outside after the sterilizing water circulation step, wherein the step of installing the sterilizing apparatus comprises the steps of: supplying water from the water purifier to the sterilizing module； A circulation line connecting the sterilizing module and the inner flow path of the water purifier for circulating sterilizing water from the sterilizing module to the inner flow path of the water purifier； Wherein the sterilization water circulation step is configured such that sterilization water from the sterilization module is supplied to the purifier internal flow path through the circulation line and then flows back to the sterilization module through the inflow line for circulation, Wherein the step of installing the inflow line comprises the step of inserting the inflow line into the inflow port of the sterilization module and the inflow port of the purifier Connecting the cock is installed in the tank, there is provided a method of sterilization of the water purifier inside the flow path.본 발명은 정수기 내부 유로의 살균방법에 관한 것으로, 살균수 공급을 위한 살균모듈을 갖추고 있으며 정수기와 독립적으로 구성된 살균장치를, 정수기의 외부에서 정수기에 연결하여 정수기 내부 유로를 살균하는 방법으로서, 정수기 내부 유로와 상기 살균장치를 연결하는 살균장치 설치단계； 상기 살균모듈로부터의 살균수를 정수기 내부 유로에 공급하고 순환시켜 정수기 내부 유로를 살균하는 살균수 순환단계； 및 상기 살균수 순환단계
