The Shui have a complex religious system that presents to them a world filled with spirits. All the objects have their own spirit. In all the activities or important events, as marriage, misfortunes, illnesses or death, the spirits can interfere.

To arrange their rites properly in this complex spiritual world they ask for the help of sorcerers or shamans (more powerful), that in every circumstance will sing the appropriate rites and sacrifice animals in order that every activity could develop happily.

For them there are approximately 300 principal spirits, which subdivide in three types: protective, kind and wicked.

The protective and kind spirits are worshipped by mean of their proper ceremonies that will assure that they extend his charitable action on the people.
To expel the wicked spirits are made other kind of ceremonies, as they can not do any good to the people.

The Book of the Shui is very important for the religious ceremonies. It consists of a White Book for the good things, and a Black Book for the bad ones. Most of the book is related with the exploration of the calendar and the way of chose the auspicious days for every activity.
Sorcerers and shamans usually inherit their techniques from fathers or uncles. While they learn the way of know the will of the spirits, they keep the same kind of life than the rest of the people of the community, without give up the productive task.

Their principal gods are:

- The God of the Fields. It is responsible for the crops and survival of the persons. His ceremonies are realized in the time of sowing and harvest.
- The God of the Door, whose task is to protect the family.
- The Lady Goddess, in charge of protect the children.

The Shui believe that after the death the body decomposes but the soul can remain in the world, becoming a ghost. It is necessary to carry out the appropriate funeral rites to avoid it. Their funerals have an important festival component. While livestock is sacrificed in honor of the deceased's spirit, the people sing, dance or play local operas.