A desktop aquarium device with enhanced water filtration is provided. The aquarium device contains a base and a spherical tank. A filtering dish is installed inside the base. The filtering device provides a winding pathway for water to flow through. Along the pathway, biological filtering balls are placed. An air pump is also fixedly installed inside the base. The base is closed from the bottom by a bottom cover. The tank is locked to the base and the tank provides an aquatic environment. Inside the tank, there are a filtering device and a water outlet. Through the water filtration provided by the biological filtering balls along the water pathway inside the filtering dish, the water in the tank requires less frequent replacement, making the aquatic cultivation simpler and more convenient.