The aim of this study was to investigate the cognition and management of emergency nurses experiencing workplace violence. Nurses experiencing workplace violence in the emergency department of a medical center were included in the study, and nine nurses aged 28 to 45 years were enrolled. They were willing to express their experience and feelings, and participated in focus group interviews. On the basis of a content analysis, we summed up the following five major themes: (1) unpredictable violations, (2) risk signs and behavior of violence, (3) team support to resolve an emotional crisis, (4) application of deterrence strategies, and (5) consultation and self-preparedness. The results of this study can serve as a reference for emergency practitioners and administrators involved in providing safe working environments for emergency personnel and establishing workplace safety measures.