Suicide has become an important issue in the public health and medical-related field in the past decade and has also aroused the attention of government in Taiwan. It has been one of the top ten cause of death since 1997 . The high percentage of people who act on suicide idea in different age groups pose great challenge to healthcare personnel. Clinical workers are first-line gatekeepers of patient health and safety. They are supposed to be willing to care for people with suicide risk and can be equipped with the ability to identify patients with suicide risk. However, the negative attitudes of medical workers towards people who have suicide attempt and self-harm behavior may affect the patients' intention to seek professional help and the nurses' quality of care for these people . At present, the investigators have limited nursing curriculum related to the concept of and guidance for suicide prevention and limited resources that guide nurses to do suicide risk assessment. Few information about suicide process and suicide risks are available for nurses , which may result in their inability to provide proper care for this group of people. If the investigators can improve the ability of suicide risk identification of the nurses, the investigators may promote nurses' confidence and change their attitudes in caring for such patients. Also, nurses can learn how to empathize suicidal patients, intervene at early stage of patients' hospitalization, and potentially build good nurse-patient relationship with patients under high risk for suicide. Furthermore, the investigators can refer patients to receive appropriate therapy and to provide adequate support to reduce their suicide attempts. The investigators addressed the background and importance of this study in the following sub-sections: