Er Ke Cuo Yao(The Pediatric Summary) is the first monograph on pediatrics of Western medicine translated and introduced in the late Qing Dynasty. It occupies an important position in the history of the development of modern pediatrics and modern Western medicine in China. Edited by American missionary Mary Hannah Fulton and translated by Chinese Western medicine scholar Yin Duanmo, the book consists of 2 volumes and 14 books, including general discussion of pediatrics, diagnosis of pediatric diseases, and discussion on teething, throat diseases, gastrointestinal diseases, worms, liver diseases, abdominal epimesis, and new infectious diseases, etc. covering the diagnosis, treatment, maintenance and other knowledge of Western medical pediatrics. The source of Er Ke Cuo Yao is not yet available, but it may be a synthesis of various materials, and the translation uses paraphrasing, transliteration, and traditional Chinese medicine terminology, and the language is easy to understand. Er Ke Cuo Yao reflects the level of development of pediatrics in Western medicine in the early modern period, makes up for the lack of pediatrics knowledge of traditional Chinese medicine, and plays an active role in the diagnosis and treatment of common pediatric diseases, epidemiological diseases, surgical diseases, and malnutrition prevention.