The "Plant Recognition Learning System" aims for meeting the needs of educational ecotourism. The system functions when users, mostly parents and children, are studying certain plants or species on site. Users can simply take photos for the plants or species and transfer them to the remote database. With efficient recognition abilities, the system will deliver feedbacks promptly--all process is completed via smartphones only. As a "portable encyclopedia of ecology", this system facilitates ecology learning and makes ecotourism even more informative and educational.