It is the key to prevent and control brucellosis by early diagnosis and identification that mainly include the technologies of bacteriology,serology and molecular biology. The brucellosis vaccines have been playing an important role due to the strategy of“Prevention First”,and the live attenuated vaccines are commonly used at present. With the development of molecular biology and recombinant DNA technology,genetic engineering vaccine has developed rapidly and become a hotspot in recent years. However,no any differential diagnosis technologies and corresponding vaccine products for distinguishing vaccine immunity from natural infection have been available. In this paper,the etiology,epidemiology,diagnosis technology and brucellosis vaccine development status were summarized,which laid a foundation for the establishment of a popularized diagnosis technology with high sensitivity,specificity and efficiency,as well as for the development of the more effective and safer vaccines.