The invention relates to an unmanned supermarket vending method, which includes the steps of determining whether a user is in a state ready to pay, sending a request for acquiring a video permission of the user; allowing the user to enter a vending area when the request for acquiring the video permission of the user is passed; acquiring a video of the user at the vending area; and when the user leaves the vending area, judging whether an abnormal operation occurs according to the video, and if not, deducting the charge according to the selling price of each item in a shopping cart of the user. By allowing the entry of the user in the state ready to pay, the method of the invention solves the problem of automatic checkout, saves a great deal of human resources, can avoid subjective abnormal operations as much as possible, facilitates the shopping operation, improves the checkout efficiency, meets the demand for development in today's society, and can liberate limited human resources to a broader platform. The design of replacing human with machine enhances the processing efficiency and accuracy, and is especially suitable for supporting relevant engineering bases of the Belt and Road construction.