The pace of modern science is fast. So does the change and development of enterprises. The life cycle of products is getting shorter and shorter. Enterprises make less and less profit while they only rely on the new technology and improvement of engineering. While the enhancement of "service" concept becomes another source of profit, Logistics becomes one of the major sources of increasing profit. Thus, the reduction of the inventory in supply chain becomes a significant solution of profit increase.
TONWEL Audio Electronics Company's total supply costs of which inventory is the major aspect occupy more than 50% of the gross sales. For this matter, it decides the necessity and importance of analyzing the inventory system rigorously and optimizing the costs. It is the utmost potential channel for enterprise to increase profits through the way to lower the costs in inventory management. If the inventory control is not done well, it will cause a large amount of funds to be occupied and used, and relevant manage costs to increase. Meanwhile, the quality of inventory management itself has an influence on the supply good's price, quality and punctuality, and then the products' price, quality and supply time, finally the competition of enterprise.
In the paper, I have researched the case of TONWEL Audio Electronics Company's inventory, analyzed the problems, and made good use of the ABC classified-control method. Based on the inventory controlling mode of classical service level and allow shortage, but replenish the stock instantly, I calculated the different economic order quantity and safe inventory, put forward the solve schemes and proposed the tentative plans of inventory from angle of supply chain management.
KEY WORDS：inventory，inventory control，economic order quantity，supply chain management
