This dissertation is an analytical study. It applies a transdisciplinary research and a case study. It has three objectives: (1) To study the Depression in Psychology and clinical treatments of mindfulness; and (2) to study Buddhist mindfulness applications for reducing Depression; finally (3) to analyze two kinds of mindfulness and integrate the function for reducing Depression.
Achieving the objectives of the study allows to know that (1) Depression and its treatments are related to the management of emotions and cognitions, the latter two could cause physiological and psychological changes, and mindfulness practice is used to change them by cultivating specific attitudes and forming alternative schemas; and (2) Buddhist mindfulness is for cultivating three kinds of wisdom from threefold training to change one's life realm, so it is about ascension of life realm by the positive feedback loop of study, practice and realization; finally (3) Psychological mindfulness is popularized with a scientific package, so it helps practitioners to get knowledge. But Buddhist mindfulness emphasize the ascension of life realm, so it helps to get wisdom. In order to form a harmonious life style or even enlightenment style that has no way to cause Depression or other sufferings, mindfulness functions to integrate subjective and objective dualism which could transform the mind from learning to learned states.