Theology is usually used to refer to the systematic study of Christian beliefs.
The word "theology" comes from the Greek word "God" theos, which can be understood as "the study of God", just as biology is the study of life.
The research object of theology is not only God in Christian thought, but also covers all aspects of Christian doctrine, including and surpassing the Christian doctrine of God. To discuss "Christian theology" is to discuss the doctrines of Christian faith and the basis and source of these doctrines.