Abstract:This paper analyzes the agro-meteorological conditions of Longan autumn shoot and second physiological fruit drop in Quanzhou from 2011 to 2012. According to calculate meteorological disaster indicators that affected Longan growth during different periods, the differences of fruiting rate in different regions are given out. Based on the actual weather process, fruit drop phenomenon in the two physiological periods are analyzed and the main meteorological causes for the different fruiting rate in 2012 over Quanzhou Longan planting area are put forward. By means of meteorological instruments such as automatic weather station, the agricultural workers can real-time monitor the Longan and the climate features are provided at blooming and fruit setting periods in order to take appropriate measures and management.