In the process of warehouse management, receipt, delivery, storage and picking are the four most common basic modules. Picking is an important operation link in the warehouse, which is of great concern. Its labor volume, time-consuming and cost proportion often rank in the forefront in the process of warehouse management. Therefore, it is said that solving the picking problem is one of the important criteria to improve the level of warehouse management. The picking accuracy is higher. Due to the simplified operation process of workers, the relatively simple repeated action makes the control of picking error rate more effective. The accuracy is usually improved by 10 times on the basis of the conventional picking error rate of 3 ~ 5 ‰

the picking efficiency is improved. Due to the saving of walking time, the picking efficiency of goods to people under the same workload is higher. Some data show that it can even reach 3-6 times that of ordinary manual picking