Emergency medicine and intensive care medicine have many similarities. In this review, we will first discuss the terminology of emergency medicine in a hospital in terms of a uniform designation as a department for emergency medicine or emergency department. Emergency medicine and intensive care medicine are a location-independent concept of patient care in the sense of the recognition, treatment and diagnosis of acute health disorders. Emergency medicine covers the entire range of disease severity, while intensive care medicine focuses on organ replacement and organ preservation, uses highly specialized technology for this purpose and treats only the seriously ill. The treatment of seriously ill patients in the emergency departments requires special intensive care medical knowledge both by the physicians and nursing staff. In the medical field, the curriculum for the European emergency medicine specialist takes into account all aspects necessary for the diagnosis and treatment of critically ill patients. For the nursing sector, Germany has had its own recognized specialty training program in emergency medicine for several years. However, the treatment of critically ill patients in emergency departments also requires that the emergency departments be adequately equipped. In this regard, there is an urgent need for statutory quality criteria that are concrete and structured. We know from the literature that intensive care competence in emergency departments reduces the admission rate to intensive care units and the mortality of all emergency patients. The concept of intensive care units in the emergency department is gaining popularity in the USA and should also be evaluated for implementation in the German-speaking countries.