The Bufonidae toads are extensively distributed in the world （except Australia and Madgaska） due to their strong adaptive ability. The distribution and evolution patern of Bufonid may fully reflect the historical process of the geological, geographical and climatic environmental changes of the world and related areas.China, as the broad and special location, is the key area for study the evolution of Bufonids in Eurasia and its disperse and evolute into Asia. However, the biodiversity of Bufonidae in China is still not completely recognized by now, and needs further extensively and densely field expeditions and classification researches, then take it as the base, to proceed a complehensively and densely research on the classification, phylogeny and evolutionary mechanisms of the bufonids of China by the conmbined methods of morphology, ecology, cytology and molecular, so as to clarify the taxonomical status and generic belongs of each species, make sure the biodiversity and its distribution paterns, inquire the systematical evolutionary positions of the different species and species-groups of the Bufonids of China in the whole Bufonidae family, and their initiating, spreading, adapting, dividing and systemtic evolving in the different areas of China, especially the Qinghai-Xizang Plateau，Trans-Himalaya and their adjacent areas， analyse the process and mechnisms of species evolution and the related natural historical backgrounds of geology, geography and climatic environments. Then take the phylogenetic evultion of Bufonid toads as a sample, study the regular rules of the Laulasia (Northern Hemisphere) originated species groups which disperse and evolve in the Eurasia and into the Asia，and the rules of the origination, formation and evolution of the species and species groups in the southwestern China, particularly the Qinghai-Xizang Plateau, Trans-Himalaya and their surrounding areas.