There is a remarkable percentage seeking for medical help among patients who harmed themselves before committing suicide. These patients not only appeared in psychiatric department, but also seek medical help in different medical settings. According to a systemic literature review, people of self-harm behavior think they do not have good communication with medical workers, and most medical workers do not have idea about what self-harm behavior is either. This is a common problem in the medical system across different departments. The investigators also understand that negative attitude or knowledge do actually exist in the nurses of Emergency Department and doctors. Tzeng & Lipson (2005) suggested that medical workers need to know the reasons of suicide or self-harm behavior and the kind of interventions that may be helpful. Cognition and attitude training like this is not usual in nursing education, but nurses, among the medical group, have relatively more time to stay with patients. So strengthen the training of suicide evaluation and identification can help us to know the potential group of high risk, and also provide social support and medical connections to reduce the formation rate of suicide and self-harm behavior.