Abstract: The paper aims to improve the forecast accuracy of typhoon torrential rain, reduce the impact of typhoon torrential rain on agricultural production. By using conventional observation data and FY-2E satellite cloud pictures, the authors analyzed the cause of typhoon“Matmo”torrential rain in Shandong. The results showed that: the heavy rain in earlier stage was caused by the typhoon inverted trough, and middle and low latitude weather systems’interaction in later stage led to heavy rainstorm in Shandong peninsula; water vapour bright area on the satellite cloud pictures corresponded to the upper wet area in the troposphere, bright area overlapped with lower water vapour flux divergence of great value and high energy tongue at 500 hPa total temperature field, which had good instruction significance to the path of typhoon forecast and the rainstorm fall area; the changes of morphology and grayscale in water vapour images could monitor more effectively in the interaction of middle and low latitude weather systems, the superposition of cloud winds products could monitor transformation of wind and cloud more clearly, which turned into extratropical cyclone from typhoon after entering the middle latitude, cloud winds products could play an important role in typhoon forecast.