At the beginning of the 20th century, open-shelf literature management was advocated. 1933 the precedent of the first open graphic design of enoch Pratt free library in Baltimore, USA. After that, American architect A.S. MacDonald put forward the idea of modular architectural design according to the idea that readers are close to books, and successfully applied it to the construction of Iowa State University LibraryNo. 1955, which is regarded as a milestone in the history of library architecture. Since then, the modular library architecture model has gradually become popular in Europe and America, basically replacing the fixed function model.