This paper mainly discusses the characteristics, volume, size, source and harm to human health of dust. This book tells us that dust fills all the spaces around us and can only be seen when the sun shines on the dark room. The amount of dust varies from place to place. Dust also has a great influence on meteorological changes. There are many sources of dust, which may come from nature or cities. Dust can also cause diseases. Let us realize that in order to be healthy, we must control dust and protect the environment. Nowadays, people are trying to make dust benefit mankind. A Journey to Dust is a collection of works by Gao Shiqi, a famous popular science writer. The book is divided into three parts: scientific anecdotes, scientific sketches and scientific fairy tales. It makes profound scientific knowledge vivid and clear in easy-to-understand language, completely uncovers the mystery of science, and leads young people to easily enter the magical scientific world.