Prof. Peter Singer is a Utilitarian philosopher, living in the United States and Australia, and I am a Buddhist practitioner, living in Taiwan. We are both atheists and scholars, and we share a commitment to improving animal welfare. This article explores how is it that our differing starting points lead to the same conclusion? As usual, Singer proved by utilitarian viewpoints that animals, like humans, must be considered equally, and I proved the same conclusion by the Buddhist viewpoints: dependent origination, protecting life, and middle way. In the course of our dialogue, we have stirred up some depth discussions, such as: How can we 'putting our self in others' Shoes'? How to explore the correctness other's personal experience. In the public sphere, in order to improve animal welfare, is it possible to draw a line that considers animal welfare equally?