With the changing of the society and the progress of Biotechnology, people's values were changing. People no longer took the matters of course in the past for granted. Those matters were changing with the differences of time, culture, customs and habits. The traditional relation of treatment and illness and the judgments of medical treatment ethics were changing, too. Therefore, the issue about ethics was discussed widely. This text brought intensive care performance and the need of patients' family into considerations and address some often seen ethics issues from intensive care performance including ethical problems, the dilemma of ethics, signing the document which was about not to implement DNR and so on. The text finally addressed the possible thoughts of nurses in order to make the good ethical decisions, and let the work quality of intensive care unit to achieve the request of responsibility and trust.