The hydrogen fuel cell demonstrator is a visual teaching tool in chemistry and energy education, consisting of a fuel tank (hydrogen storage), an oxidant tank (oxygen or air storage), electrodes, electrolyte, and power generation display devices (such as small light bulbs and ammeters), simulating the working principle of hydrogen fuel cells. In teaching, it demonstrates the process of directly converting chemical energy into electrical energy: hydrogen loses electrons at the negative electrode, oxygen gains electrons at the positive electrode, forms an electric current through the electrolyte, drives the display device to work, and the product is only water. Suitable for the "Chemical Reactions and Energy" unit in middle school chemistry, helping students understand the working principle of fuel cells.