This study proposes an intelligent pickandpass system and a storage assignment algorithm to improve orderpicking operations in ecommerce warehouses. In this paper, the structure of the pickandpass system and the idea of the algorithm are presented. The algorithm has been applied to the lineside storage optimization of the picking line at FineEx, a supply chain management firm in Shanghai, and its effectiveness has been verified using the real data from FineEx. Combined with hardware equipment, the algorithm has created a commercialized smart picking product that significantly enhances order sorting efficiency. This solution can mitigate the pressure brought by labor shortages during ecommerce promotions.