Abstract: The present disclosure provides order processing systems, methods, and devices, and order-picking batch generation methods and devices. One exemplary order processing apparatus is configured to: generate a corresponding order according to commodity ordering information input by a user; determine whether a back-of-house stock quantity of a commodity object related to the order satisfies the order quantity; and if the back-of-house stock quantity of the commodity object related to the order satisfies the order quantity, perform back-of-house stock occupation for the commodity object related to the order and label the stock occupation type of the order as a back-of-house type. Order processing solutions provided in the present disclosure can avoid the problem of failed order-picking and delivery due to insufficient stock of online orders, thereby improving order-picking and delivery efficiency.