We have graphene oxide quantum dots, graphene quantum dots, semiconductor quantum dots, etc., which can provide different colors of luminescence options, such as green light, blue light, red light, and white light. Meanwhile, graphene quantum dots with different functional groups can be selected, which is also helpful for later modification and coupling. In addition, there are nitrogen doped and boron doped graphene quantum dots to choose from. At present, the application of graphene quantum dots is mostly focused on fluorescence imaging, nano additives, antibacterial, and biological toxicity.