The low quality of learning today is marked by the low learning outcomes of students. One of the indicators causing the low quality of learning is the weakness of school principals in academic supervision activities to leverage and empower the teaching potential of teachers. Thus, it is important to construct principals' academic supervision activities based on humanistic spirituality values according to the independent curriculum guidelines. The purpose of this study is to describe the reasons for implementing humanistic spiritual values and the role of the principal in academic supervision activities. The research method uses qualitative research, case study design. The participants in this study were 3 principals and 3 senior teachers from the 2 schools studied. Data collection through interviews, observation, and documentation studies. Data analysis used a modified analytic analysis method. The results of the study explain the reason for the principal's application of humanistic spiritual values (personal characteristics, the spirit that is lived in the school environment, and the appreciation of religious teachings) in academic supervision. In addition, the role of the principal in academic supervision is proven through ethical behavior, sincerity, patience, humility, sensibility, friendliness, equality, open communication, mutual respect. This research has implications for the development of school principals' academic supervision based on humanistic spiritual values in an effort to empower the teaching potential of teachers as evidenced by an increase in student achievement motivation.