The objectives of the thesis are to study the meaning the characteristics the type and the levels of Cāga, The Doctrinal principles supporting  Cāga and refusing  Cāga and to study the profit and the application of Cāga in Theravāda Buddhism.

       From the research, it is found that Cāga means the devotion donation, and the shares of the happiness together. The types of Cāga are the donation of materials such as money, gold and things. And another is the donation of emotion which is the abstract that donates from inside of mind such as love and pleasure, the wishing and the defilements. We can resolve the properties with five steps which are:- Property, sons and daughters, wife, body, and life, to others. Cāga is at the level of Pāramī which is of three levels:- Pāramī , Upaāramī and Paramatthapāramī.

        The Main Dhammas that promotet  Cāga are; Alobha: Non-greed, Adosa: Non-hatred, Amoha: Non-delusion, Sīla: Moral conduct, Saddhā: confidence, Upasama: Tranquillity, Mattā: Loving-Kidness, Karunฺā: Compassion and Muditā: Altruistic joy. The refusing principles of Cāga are; Maccaharity: Meanness, Lobha: Greed, Dosa: hatred, Moha: Delusion,