Abstract: Bingzhi is the forerunner in practicing the philosophy of saving the country by science and the pioneer of China's zoology. In the process of saving the country by science and cultivating scientific research talents, he particularly focuses on constructing and advocating the role of “the essence of scientists”, the value consensus of scientists’ spiritual quality and behavior norm. Based on an in-depth analysis of the spiritual outlook of Chinese scientists in the 1930s and 1940s, he proposed and systematically elaborated “the essence of scientists” with “selflessness, devotedness, trustworthiness, industriousness, persistence, benevolence” as its main content. It is valuable for reference for carrying forward the spirit of scientists in the new era.