Abstract: A fast determiner of material drying curve with chip microprocessor 8098 as its key part was developed in the paper. At certain temperature set points, this determiner can automatically measure the mass of material while it is being dried, then the materials moisture content can be obtained, and a drying curve can be drawn. This equipment is useful for the design of drying devices,and can also be used in fast weighing of moisture content in the purchase,drying and storage of materials to ensure their quality.