This paper aims to summarize the characteristics of the scale structure of the spring stool in Ming Dynasty, clarifies the relationship between the spring stool and the back stool in Ming Dynasty, and explains the free culture of spring stool in Chinese traditional furniture opposite to the etiquette represented by chair furniture. According to the ancient literature and in combination with the relevant concepts and edition theory, the problems in the circulation of Lu Ban Jing were conjectured on. The paper proved the transformation of Qin and Chun by Visual Gestalt Theory in Gestalt psychology, analyzed the collective unconsciousness displayed in the pictures of Ming Dynasty from the perspective of iconography, and then clarified the cultural implication of Ming Dynasty displayed by the spring stool. The Ming stool is now known as the bench, which contains the spring stool. And the only difference between the spring stool and the back stool falls on the back. The "Qin stool type" clause in the classic of Lu Ban Jing is a "Spring stool type". The spring stool is different from the chair furniture representing etiquette, showing a kind of free culture that desalinates the shackles of etiquette.