This mainly depends on the actual situation. Many libraries have different bookshelves and books with different thicknesses, so the number of books varies greatly. However, in general, when designing library bookshelves, it is expected that 50 books will be stored on the first floor (single-sided, flip-flop and flip-flop bookshelves can be placed). Generally, the bookshelves are five floors, so about 250 books will be stored.