Aimed at the problems of unknown mechanism and transmission mechanism of drought in Poyang lake basin，insufficient drought monitoring，prediction and early warning capacity，drought risk assessment and prevention and control measures，this study carried out the research on the construction of technical system for drought monitoring，prediction and risk assessment in the basin.It successfully created a monitoring technology system with multi-source data，multi-process elements and multi-spatial dimensions，a dynamic drought prediction and early warning technology system with all-factor and the whole process，and a comprehensive drought risk assessment and response technology system.It also developed a decision and command system for drought prevention and relief in Poyang lake basin that integrates the three technology systems，effectively improving the drought prevention and relief capability and providing strong technical support for scientific response to drought disaster of Poyang lake basin.