New coronaviruses causing human and/or animal diseases have continuously appeared in the last 50 years. Recently, a new coronavirus isolated from patients with unknown pathogen pneumonia in Wuhan has been sequenced. The World Health Organization state that “Preliminary identification of a novel virus in a short period of time is a notable achievement and demonstrates China’s increased capacity to manage new outbreaks.” This article briefly introduces the emerged new coronaviruses and makes suggestions for preventing and managing the outbreak of emerging coronaviruses or other viral diseases.