1. Small-scale display: places with a small number of books, such as family study rooms and small libraries, can be classified according to personal interests or themes, such as literature, history and art; Or in alphabetical or numerical order, so as to find the book you need quickly.
2. Medium-sized display: For places with a large number of books, such as medium-sized libraries or professional bookstores, you can use themes or categories to divide and layer, such as humanities, nature, society, science and other types, and then make detailed hierarchical classification, which is more convenient for readers to locate and find quickly.
3. Large-scale placement: For places with a huge number of books, such as large libraries and reference rooms, multi-level and multi-angle classification strategies are needed, such as classification according to disciplines, languages, editions, majors, regions and other dimensions, labeling and management with symbols, colors, labels and other signs, which is convenient for quick reference and positioning.