A good organization always opens to change. To make changes that support organizational development, it is necessary to know the organization well. One organization that is interesting to research when talking about change is a seminary. In order to find answers related to mentoring methods in seminaries, researcher conducted research at one of the major seminaries in Yogyakarta, namely Seminari Tinggi Anging Mammiri (STAM). This research was conducted to determine the current process of developing priest candidates at STAM. To achieve this goal, researcher conducted research to map the current strategy of STAM by using the nine blocks adaptation in the Business Model Canvas. The data collection process was carried out through surveys with a qualitative approach and Focus Group Discussions (FGDs). Research data obtained from surveys and FGDs were classified based on blocks in the Business Model Canvas and then analyzed based on supporting literature. The research results show that the current mentoring process at STAM can be mapped into nine (9) elements of the Business Model Canvas block, but STAM can still optimize its business model. This can be done by continuing the analysis of each existing block and optimizing it.