Although we frequently apply the adaptation concept in subjects, daily life and clinical settings, it has not been unanimously conceptualized. The paper was to adopt the methodology proposed by Walker and Avant (2005) to analyze the concept of adaptation and to define the attributes as follows: (1)One interact with the inner and outer circumstances, suffering stimuli, to result in a state of no-equilibrium (2) One continuously adjust the function of physiology, psychology, society and culture to react to the circumstances (3) One efficiently control the stimuli to reach a state of equilibrium. Then to set up model, borderline, related and contrary cases, to determine antecedentsconsequences, to outline empirical referents, and to form conclusions.