All the Douluo Dalu books except the fourth took place only on the home planet. One of the many planets/planes within the universe. The birth place of spirit beasts and one of the many birth places of humanity. It is classified as a high-level plane because it was able to sustain life. Once made up of four continents and many islands, between SL and SL2, the Sun Moon Continent and the Douluo Continent collided with each other creating a single continent. The two remaining continents were occupied by the remnants of the Dou Ling Empire and the Star Luo Empire between SL2 and SL3 creating the Dou Ling Continent and the Star Luo Continent.
During the events of SL3, the planet was in danger of being devoid of life by another plane, the Abyssal plane. In the end, the Douluo Planet devoured the energy from the abyssal plane, upgrading itself. This allowed spirit masters to break through to rank 100 and beyond.
In SL4, the planet became one of the few planets that has the most abundant life energy because of the large scale replanting of various plants and flowers.