In Ulysses, the modern national epic of Ireland, there are images of animals almost in every chapter. Firstly, through these images of animals, Joyce expresses various kinds of bitterness and hardship of the Other and the Other of the Other. In Ulysses, animals are the images of the Other of human beings and the Other of the colonialists, which are mainly used by the colonizers to show the inferiority, the obedience and the threat of the colonized.Secondly, the images of animals are exploited to reveal the arbitrariness and absurdity in the mutual definition and presentation between the colonizers and the colonized. Thirdly, the images of animals are also employed to express the author’s ideals about animals, that is, humans and other animals should be equal. Finally, it is very hard for the author of Ulysses to be free from the haunting of the spectre of speciesism.