The hearts and minds of the Bo Y are held captive by a polytheistic religion.  They hold to a complicated set of religious beliefs derived from a mixture of Buddhism, Daoism, animism, Confucianism, polytheism and ancestor worship.  They have many superstitions, as revealed by their many rituals and ceremonies.  The Bo Y worship a pantheon of spirits, including the spirit of heaven, the earth, the mountains and the soil.  A specific spirit deity that they honor is Ha Ba, the emperor of the waters.  They also revere many other specific spirit entities such as the spirit of fire, water, rivers and forests.

They also practice an ancient form of exorcism which involves hiring a shaman to cast demonic spirits out of a home or other living area.  This practice is called Nuo.