“Systematic” refers to something being put into a system. Systematic theology  is, therefore, the division of theology into systems that explain its various  areas. For example, many books of the Bible give information about the angels.  No one book gives all the information about the angels. Systematic theology  takes all the information about angels from all the books of the Bible and  organizes it into a system called angelology. That is what systematic theology  is all about—organizing the teachings of the Bible into categorical  systems.

Theology Proper or  Paterology is the study of God the Father.   Christology is  the study of God the Son, the Lord Jesus Christ.  Pneumatology is the study of God the Holy Spirit.   Bibliology is the study of the Bible.   Soteriology is the study of salvation.  Ecclesiology is the  study of the church.   Eschatology is the study  of the end times.  Angelology is the study of  angels.  Christian Demonology is the  study of demons from a Christian perspective.  Christian  Anthropology is the study of humanity.  Hamartiology is the study of sin. Systematic  theology is an important tool in helping us to understand and teach the Bible in  an organized manner.

In addition to systematic theology, there are other  ways that theology can be divided. Biblical theology is the study of a certain  book (or books) of the Bible and emphasizing the different aspects of theology  it focuses on. For example, the Gospel of John is very Christological since it  focuses so much on the deity of Christ (John 1:1, 14; 8:58; 10:30; 20:28). Historical theology  is the study of doctrines and how they have developed over the centuries of the  Christian church. Dogmatic theology is the study of the doctrines of certain  Christian groups that have systematized doctrine—for example, Calvinistic  theology and dispensational theology. Contemporary theology is the study of  doctrines that have developed or come into focus in recent times. No matter what  method of theology is studied, what is important is that theology is  studied.