Flushing method and system of closestool

The invention discloses a flushing method and system of a closestool, and relates to the technical field of closestool control. The method comprises the steps that when it is detected that a user gets close to a closestool body, a closestool cover is controlled to be automatically opened; when it is detected that the toilet lid is completely opened, the air draft device is controlled to be started, and air in the toilet body is pumped into a sewer; when it is detected that the user leaves the closestool body, the closestool cover is controlled to be closed firstly, then the water spraying device is controlled to be started to spray water into the closestool body and the closestool cushion, and excrement on the inner side of the closestool cushion and the closestool body is cleaned. By arranging the water spraying device, after the closestool cover is automatically closed, a high-pressure spray head can flush and clean excrement on the inner side of the closestool cushion and the inner side of the closestool b