The application discloses a meteorological-
vegetation drought transmission characteristic identification method and
system based on a three-dimensional clustering
algorithm, which comprises the following steps: S1, identifying meteorological drought events and
vegetation drought events in a research period based on a three-dimensional clustering
algorithm; S2, determining characteristic variables of the meteorological drought events and the
vegetation drought events; S3, proposing a drought transmission identification rule based on three-dimensional space-
time clustering, and matching meteorological-vegetation drought event pairs; S4, determining types of the meteorological-vegetation drought event pairs; and S5, extracting characteristic variables of a meteorological drought to vegetation drought transmission process, and clarifying the meteorological-vegetation drought transmission process. The method and
system can quantitatively identify characteristic changes in a meteorological-vegetation drought transmission process, reveal transmission characteristics of meteorological drought to vegetation drought, clarify the internal relationship,
response characteristics and transformation mechanism between meteorological drought and vegetation drought, and provide scientific and technological support for accurately predicting and preventing vegetation drought.