“Patient Autonomy Act” in Taiwan has legislated for the right of Patient Autonomy in 2019. The autonomy right means: under some circumstances, the patient could make medical decision according to his/her own true desire. Therefore, how nurses help them to make emancipated decision also be a significant nursing concern in clinical settings. In 2013, NANDA (North American Nursing Diagnosis Association) has presented the new nursing diagnosis as “impaired emancipated decision-making”. However, there are few researches about this nursing diagnosis or concept of emancipated decision. To better understand about this concept for nurses, a clear definition is important. This study utilized the Walker and Avant method of concept analysis to define and describe the concept of emancipated decision. Literature searching was conducted through databases and materials in English, Korean and Chinese. The results showed that “Emancipated decision making” is a complex decision-making process from an aware of limitation and reflection in the inequal environment, then attempt to emancipate the limitation and make the most appropriate choice. According to the literature, the concept is characterized by three attributes: autonomy, independent and congruency. This study dedicated to clarify this concept for nurses to understand of the attributes of emancipated decision during practice or research. Moreover, we can further distinguish the conceptual differences between Emancipated Decision Making Theory and other decision-making theory and lay the foundation for future research. We could let the patients truly become the protagonist in the process of decision-making through dialogue and communication.