Here　we　introduce　a　simple,　superfast,　and　scalable　strategy　that　obtains　graphene　quantum　dots　(GQDs)　within　3　min　under　microwave　irradiation　(MA-GQDs).　The　MA-GQDs　exhibit　excellent　fluorescence　quantum　yields　up　to　35%　in　the　optimum　reaction　condition.　The　MA-GQDs　with　single-crystalline　and　few-layer　structure　can　reach　the　visible　region　with　the　longest　absorption　wavelength　at　700　nm.　Moreover,　these　ultrabright-fluorescence　and　stable　MAGQDs　as　a　phosphor　and　fluorescence　probe　could　be　efficiently　applied　in　white　light-emitting　diodes　and　cell　imaging　fields.　The　developed　pathway　to　GQDs　can　provide　unambiguous　and　remarkable　insights　into　the　design　of　high-fluorescence　and　few-defect　GQDs,　and　expedite　the　applications　of　GQDs.