The most famous works of Leonardo da Vinci's life. Among many paintings with the same theme, this painting is recognized as unprecedented, especially for its ingenious conception, excellent layout, realistic details and rigorous and decent relationship. When creating a painting, he shows it on the whole wall at one end of the restaurant. The perspective composition of the restaurant is connected with the architectural structure of the restaurant, which makes the viewer feel immersive. The characters in the picture, their expressions of fear, anger, doubt and remorse, as well as their gestures, eyes and behaviors, are all described in detail and vividly. The descriptions of these typical figures are closely related to the theme of the painting, and complement each other with the effect of diverse and unified composition, making this painting indisputably the most perfect model masterpiece in the world art treasure house.