Introduction to the Alsace Case Museum: The prototype is the solar wall of Buxwell High School in Alsace, France. This is an example of an energy-saving and environmentally friendly building that achieves indoor comfort through solar energy. The water curtain solar wall on the south facade of the museum is automatically controlled by a computer and can automatically open and close as the outdoor temperature and sunlight intensity change. It can not only provide shade and cooling, but also reduce energy consumption.