On May 25th，2015，a report of 10 serum samples from a goat farm of one district being tested brucellosis-positive was submitted to Shanghai animal disease prevention and control center. after?a?review?of?its subordinate body of veterinary diagnostic center，the positive results were confirmed again. In order to find out the occurrence reason，to identify potential sources and to trace its trend of spreading，a working team consisting of staffs from both Shanghai and the district animal disease prevention and control center was set up. Then the team arrived at the spot，and an emergency investigation was conducted using a variety of ways including panel discussion，questionnaire survey，field survey，sampling as well as looking up the archives. Results of the investigation indicated the cause of goat brucellosis was private vaccination without official approval by the owner. Objective to cut down the abuse of brucellosis vaccine，suggestions were put forward，which included confiscating the remained vaccines，punishing the behavior of vaccine abuse in accordance with the Animal Epidemic Prevention Law of the People's Republic of China，strengthening the policy advocacy，as well as carrying out training programs for brucellosis prevention and control.