Triage is dynamic and consistently a process used to determine severity of ilness or injury and life-threatening conditions for each patient who enters the emergency department. Triage consist different classifications which include patients rangers from emergent to expectant. The most common system uses three classification levels; emergent, urgent and nonurgent. Triage system has very important which is rapid available health care and treatment to patients or injured person in emergency units. The effective triage system may be provided as areas with availability and equipment, treatment and care support services, communication systems and multidiscipliner professional team. Nurses who takes responsibility must have expert assesment skills, competant interview, organizational skills, extensive knowledge base of disease and use experience to identify subtle clues to patient acuity.