Abstract: Objective The stody was conducted to analyze the seRUm IgG level of SARS Colon-avlrus among kinds of people in Jiangmen City．Methods Blood samples from different groups of people were taken to test the serum IgG level of SARS coroilavirns．Results Among 208 serum samples from groups of people，there were 53 with positive serum IgG antibody of SARS coronaviru，with positive rate of 25 48％Among them，the positive rate of SARS patients deeid-ed clinIcally aad people highly exposed were 100.OO％(47／47)and 11.54％(6／52)，respectively The blood samples from suspected patients with fever clinically and healthy people were tested，and all were negative for serum IgG antiboay of SARS coronavirus Conclusion SARS coron- avinls WaS the main pathogen for this prevalence of SARS in Jiangmen city Before the epidemicoutbreak．People were generally susceptible to SARS coronavirus．The task for SARS monitoring， prevention and control in Jiangmen City is very tough，and faced with a great challenge