The invention provides a deduction method for a ubiquitous electric power Internet-of-things emergency electric power event, and the method comprises the following steps: S1, taking the emergency electric power event as a top event, carrying out the accident tree analysis, and determining a basic event causing the top event and a bottom event causing the basic event; S2, determining a minimum cutset of basic events in the accident tree, and calculating the structural importance of each bottom event in the accident tree according to the minimum cut set; and S3, performing BowTie risk assessment based on the accident tree, determining a danger source, a risk event, a risk threat and a potential result, and setting a barrier for preventing an emergency power event to perform BowTie risk management and control. According to the method, an accident tree analysis method is adopted to carry out layer-by-layer deep analysis on the emergency power events, and safety measures corresponding to each bottom event in the accident tree are determined, so that an emergency decision maker can make scientific judgment quickly, and the occurrence probability of the emergency power events or the severity degree of potential consequences can be reduced.