Material inventory management system and method

The invention discloses a material inventory management system, which comprises a material storage area, a weighing device, a processor, a data statistics module and an upper computer, wherein the material storage area comprises at least one discharge warehouse and a plurality of storage warehouses; the processor is electrically connected with the weighing device, the data statistics module and the upper computer. An inventory management method comprises the following steps that firstly, the upper computer edits the proportion of all materials in a mixture in the discharge warehouse, S1, a feeding management method: weighing the weight of the fed materials through a weighing device, transferring the materials to a designated storage warehouse, and obtaining remaining storage data of all the warehouses through a processor and sending to the data statistics module; and S2, a discharging management method: weighing the weight of a discharging mixture by a weighing device, automatically calculating the weight of