Traditional delivery is based on the address given on the order, the package will be delivered to the user's door within the specified time, so as to realize the "door-to-door" delivery service. This type of delivery provides a lot of convenience for users, but it also reveals some problems: if the courier can not find the right receiver in the distribution process, the delivery task will fail, and the delivery needs two or even three times. In addition, the crime of courier entering the room is common, and there are hidden dangers such as personal safety, personal information exposure and so on.