Automatic stacking device and automatic stacking method

The invention provides an automatic stacking device which comprises a counting and storing mechanism, a material taking mechanism and a control unit, wherein the counting and storing mechanism is usedfor counting and stacking processed materials; the material taking mechanism is arranged in a position close to the counting and storing mechanism for clamping the materials at a preset quantity in the counting and storing mechanism and moving the materials to a preset position; and the control unit is electrically connected to the counting and storing mechanism and the material taking mechanismand controls the material taking mechanism to clamp the materials at the preset quantity and move the materials to the preset position after receiving a signal that the materials in the counting and storing mechanism reach the preset quantity. The automatic stacking device achieves automatic stacking, clamping and transferring of the processed materials, and a machine tool needs not to stop to wait, so that the production