Analysis of the daily precipitation in Fuzhou by statistical and wavelet transform methods,the monthly and decade regulations of the rainy frequency with different intensity are obtained.It shows that:(1) The heavy rainfall always break out in the period from March to September,and the serious storms (R≥100mm) are mostly concentrated within the typhoon season (from July to September),but from January to March and November to December,there is none.(2) For the decade distribution,it is constantly symmetrical.(3) The quite period of the heavy storms (R≥50mm) during the recent one hundred and ten years is 14 years.All these results will provide a reliable climatic background for the ordinary heavy rain forecast.