The current research aims to develop a psychological well-being package based on the approaches of Imam Sajjad's treatise on law. Was performed. Therefore, qualitative research method and thematic analysis strategy have been used to carry it out. In the qualitative analysis, the themes extracted by manual coding from the approaches of Imam Sajjad's treatise on law were ordered and organized around the central psychological well-being code of Imam Sajjad's treatise on law. These themes included knowledge of the Creator, excellence, commitment, self-control, gratitude, humanity, forgiveness and spiritual peace. Therefore, psychological well-being, from the perspective of Imam Sajjad's treatise on law, is the fulfillment of a believer's duties and obligations towards God, himself, and others. It promotes mental health and proper communication with the people around and the society, and divine pleasure and satisfaction, which will lead to spiritual peace and rewards in this world and the hereafter. The calculated concepts of psychological well-being in Imam Sajjad's law treatise are related to mental health; In addition, some extracted concepts are consistent with Riff's psychological well-being theories, Patterson's and Seligman's classification system of virtues, and some other related theories and 
researches.