The purpose of this research was to develop the program on learning leadership strengthening for school principals under the secondary educational service areas. This study methodology was based on research and development (R&D) approach by the application of Participatory Action Research (PAR) with 4 phases. They were 1) finding the components and indicators of learning leadership, 2) study of the present and desirable condition of learning leadership, 3) developing learning leadership strengthening model, and 4) study of the implementation results program of learning leadership strengthening for school principals under the secondary educational service areas. The research findings reveal the program development comprises 70:20:10 ratio of learning leadership development--70 percent on the job experience and off the job experience, 20 percent professional learning community (PLC) process and personal feedback, and 10 percent training. The training involves 3 phases--phase 1 is training, phase 2 is integration with work practice, and phase 3 is follow up and evaluation.