The collection is divided into four categories: natural history, art history, humanities history and popular science history, which are specifically divided into cultural relics and jewels, famous stones and ornamental stones, coins and stamps, documents, tickets, trademarks, badges, specimens, ceramics, jade articles, paintings and calligraphy. It should be said that collection is an art, but also a science. Due to the variety of collections, scientific collection, scientific positioning, scientific preservation and scientific classification are very important. This paper focuses on classification and other aspects, which will be elaborated in future special articles. From the point of view, the classification of collectibles has not yet formed a very authoritative definition and statement, which needs further study and discussion by colleagues who are keen on collecting. However, the author discussed with Tibetan friends, experts and scholars, and read relevant materials. From the perspective of China's private collection and history, relatively similar collections can be roughly divided into four categories: natural history, art history, humanities history and popular science history.