The present disclosure discloses an order processing method. The method includes: receiving at least one pending order and placing the at least one pending order in an order pool; dividing part or all of pending orders in the order pool into at least one batch of task; for any of the at least one batch of task, allocating the batch of task to a corresponding target workstation, selecting a target inventory container matching an order item for a pending order in the batch of task, and selecting a target robot for carrying the target inventory container for the batch of task; controlling the target robot to carry the target inventory container matching the order item to the target workstation corresponding to the batch of task. The present disclosure further discloses an order processing device, a server, and a storage medium.