Abstract: Haliotis diversicolor diversicolor and H. diversicolor supertexta with a high commercial value are main farming species of abalone aquaculture in South China. There are different opinions on systematic relationship between the two abalones in academic community. The paper summarized the major research progress on germplasm resources of morphology, chromosome karyotype, biochemical genetics and molecular genetics of H. diversicolor diversicolor and H. diversicolor supertexta. All the results indicated that the genetic differences between H.diversicolor diversicolor and H. diversicolor supertexta are small and probably just at the population level. Their differences are short of the subspecies level. The author submitted the new idea about those. Meanwhile, the measures to transfer and protect the germplasm resources in reason of abalones was put forward.