The invention provides a replenishment method and apparatus. With the replenishment method and apparatus adopted, replenishment tasks can be generated fast and efficiently, the accuracy of replenishment can be improved to a certain extent, and problems of messy stacking of goods in a warehouse, manpower waste and order backlog can be solved, and delivery speed of orders can be improved to a certain extent, and shopping experience of users can be ultimately enhanced. The replenishment method of the invention comprises the following steps that: daily sale quantity, safety inventory days and maximum inventory days of commodities are saved; safety inventory quantity and maximum inventory quantity of the commodities are calculated according to the daily sale quantity of the commodities, wherein the safety inventory quantity=daily sale quantity*safety inventory days, and the maximum inventory quantity=daily sale quantity*maximum inventory days; and replenishment quantity is determined and outputted under the situation that the current inventory quantity of the commodities has not achieved the safety inventory quantity, and so that the inventory quantity of the commodities can be between the safety inventory quantity and the maximum inventory quantity.