Abstract: Objective To analyze the epidemic surveillance results of Dengue Fever in Fuzhou District during 2000-2003,and to provide a scientific basis for controlling dengue fever epidemics Methods Serum samples were collected from normal indivduals in different districts and counties of Fuzhou to detect dengue antibodies. White and yellow-fever mosquitoes were caught to isolate dengue viruses,and Breteau Index of the media was evaluated. Results The positive rates of dengue antibodies from 2000 to 2003 decreased year by year with the results 4.9%,0.4%,0,0, respectively. Annual average Breteau Index of the monitoring sites was 17.7,9.6,8.3,8.1,respectively.Moreover,in Jinan and Changle districts,the Breteau Index ex-ceeded 20 in July. Conclusion 3 cases of dengue fever were diagnosed, which were epidemiologically con-firmed to have been infected outside the region. The immunity of local population was low,and the Breteau Index was relatively high. Once there was a source of infection,The immunity of local population was low,and the Breteau Index was relatively high. Once there was a source of infection,epidemics of dengue fever was likely to occur,to which we should be alert.