Why is Je-gong carrying a broom in this picture?

This is because the legend of Jigong says that he often carries a broom around to sweep away dirt, and the broom also represents the purpose of purifying the mind by sweeping away distractions and dust. At the same time, the broom is also regarded as a prop in Taoism to drive away ghosts and help evil spirits. Therefore, the image of Jigong holding a broom in his hand is widely celebrated and represented.