The goal of this study was to explore the lived experience of kindergarten teachers with mobile documentation designed to support their tracking of children's learning activities in an emergent curriculum. A structure for mobile documentation was created with the smartphone and cloud system. The phenomenological approach used in this study showed that mobile documentation supported teachers' documentation processes and cultivated the mobile learning community. In particular, less experienced teachers gained more benefits than experienced teachers because the former understood the emergent curriculum by viewing photos from and observing activities in other classrooms. In addition, the teachers' supervisor benefited from understanding the activities and projects occurring in each classroom and could provide specific mentoring to less experienced teachers. Suggestions were provided to cultivate a positive mobile learning community in an emergent curriculum.