Self-service cashier system and method

The invention discloses a self-service cashier system, method, device and equipment. The method comprises the steps: enabling the system to obtain historical order data of a physical store user through a server, and determining shopping feature data and labeling information of whether shopping bags are purchased or not according to the historical order data; learning from a corresponding relationship set between the shopping feature data and the annotation information to obtain a shopping bag purchase prediction model; determining current shopping feature data through the self-service cashierequipment according to the business object information in the virtual shopping cart; judging whether shopping bags are needed for current shopping or not according to the current shopping feature datathrough the prediction model; if so, executing processing for the shopping bag business object. By adopting the processing mode, whether the user has a shopping bag demand or not is automatically predicted during self-service