The invention discloses a typhoon rainstorm flood disaster full life cycle monitoring method. The method comprises: carrying out typhoon rainstorm space-time evolution characteristic analysis; utilizing the multi-source meteorological satellite data to carry out typhoon full-life-period remote sensing monitoring; fusing multi-source data to evaluate the risk of rainstorm disasters; and when the typhoon rainstorm causes flood disasters, carrying out air-space-ground integrated typhoon rainstorm flood disaster emergency monitoring. In addition, the invention also discloses a typhoon rainstorm flood disaster full life cycle monitoring system. By the adoption of the technical scheme, the typhoon rainstorm flood situation can be well monitored to obtain accurate information, typhoon rainstorm flood situation service is provided, and preventive measures are taken.