The integrated operation and service system for drought monitoring and forecasting in Northwest China(V2.0) is optimized and upgraded based on the former version(V1.0)and the findings of the project"Formation Causes of Droughts in Northwest China and Their Application Study"sponsored by the Gansu Provincial Science & Technology Department in 2002.The system includes seven parts: database,monitoring and diagnosis,climate prediction,weather influence appraisal,weather prediction evaluation,product distribution,and auxiliary tools.It is an integrated and highly automatic system with own features,having a good physical base and good capability of monitoring and servicing.The system has a user-friendly interface,clear structure,strong independence,high extensibility,strong flexibility,and high running rate.