Picture book: a foreign word, picture book, is taken from the name of Japanese picture book, which refers to a book with painting as the main part and a small amount of words. Picture books are the first choice for children's books in developed countries, and it is internationally recognized that "picture books are the most suitable books for children to read". Picture books are regarded as an art, which gives people a more delicate artistic feeling, both in meaning and practical application. Its functions include providing meaningful background situation, building basic ability, providing emotional expression, enhancing learning interest and experiencing learning media. Picture books are divided into audio picture books, electronic picture books and picture book magazines. Among them, picture books and magazines are divided into rambling and drawing.