Abstract: Zero-One(0-1) Test Algorithm has been adopted to explore the chaotic characteristics of rainfall-runoff time series and noises' effects.It's advantage is to avoid the reconstruction of phase space.Quantitative the progressive growth rates K(c)，whose median is close to 0 or 1，has been applied to define the chaotic characteristics of rainfall-runoff time series.A case study of Dadongyong Hydrological Station，Red River Basin，Yunnan Province，has been conducted here.This paper has collected the data of observation time series of Dadongyong Station's daily rainfall and daily runoff.Wavelet Denoising Method has been used to denoise the original time series.Meanwhile，methods of regression and correlation in 0-1 Test Algorithm have been adopted to quantify the progressive growth rates K(c) respectively to define the chaotic characteristics and analyze the effects of noises on the characteristics.Results show that 0-1 Test Algorithm is an effective means to verify that chaotic characteristics of rainfall-runoff time series exist before and after denoising.Chaotic characteristics gained by correlation method are more notable than regression method.The former is more resilient to noise interference than the latter.Thus，the vulnerability of noise in correlation method is less than regression method.