Based on telemetering pluviograph data at the intervals of 15 minutes，the precipitation events were extracted according to minimum inter-event time，and the complex orographic effects on precipitation characteristics were analyzed in spatial and temporal scales in Yinzhou District，located in Ningbo City，Eastern Zhejiang Province． As confirmed by the results，the amounts and frequency of precipitation demonstrated a significantly close correlation with the elevations in various years，and the relative larger total rainfall amounts in the mountainous areas were partly attributed to the increments of precipitation frequencies． On the other hand，the relationships between rainfall intensity，duration and elevation were found more complex，and the orographic effects were not consistent on different types of precipitation controlled by various weather conditions． The number of rainfall events that had intensities less than 2mm/h or durations of 2 to 5 hours increased significantly as the elevation rose，and this trend had been observed consistently in different years． The relationship between elevations and the frequencies of the rainfalls with high-intensity，or shorter and longer duration was more complicated，showing more random effects．