The invention discloses a moisture meter, which comprises a box body, a vacuum generation device, a lifting device and a weighing device. A first via hole is formed in the bottom part of the box body;the lifting device is used for controlling the box body and the weighing device to close relatively and be far away from each other; the weighing device is used for penetrating through the first viahole so as to enter the box body, and lifting a determined object so as to realize weighing. According to the moisture meter provided by the invention, the relative position of the weighing device andthe box body is automatically controlled through the lifting device, so that a drying and weighing process of the determined object is realized without the need for manual weighing, the labor intensity of manpower is reduced, and meanwhile, the influence of a human factor on a determination result is reduced.