This is the first chapter in Daniel of what is called apocalyptic literature. The purpose of this kind of writing in the Bible is to describe the struggle between God and his enemies using very colourful imagery. In this chapter the beasts, and the horns stand for evil kingdoms which seek to harm and destroy the people of God. The message of the chapter is that God will judge the evil kingdoms and that the son of man will have an everlasting dominion.
Read Daniel 7:1-28