Abstract: Urban traffic information service plays an important role in the application of Intelligent Transportation System.Conventional passive modes of traffic information service could not meet the public demand for the information of diverse and inconstant traffic conditions.Based on the analysis of the disadvantages of current traffic information services,this paper clarifies the necessity of the combination of active database and traffic information services.The design and framework of traffic information service based on active database are proposed.Finally,the testing of experimental system proves the feasibility and efficiency of urban traffic information services on the basis of active database.