Abstract：The time series of fluctuating pressure signals under different experimental conditions were measured by a pressure transducer, and a novel method for measuring gas holdup in bubble column was proposed, namely, the local gas holdup was estimated by resorting to local intermittency measurement (LIM) method and multi-resolution analysis of the time series of fluctuating pressure signals. Firstly, the dominant wavelet scale was determined, which corresponds to the major frequency of power spectral density function (PSDF) of pressure fluctuating signals. Then, signals corresponding to this scale were selected for an intermittent behavior analysis. Consequently, by choosing a proper threshold value on the LIM profile of the major scale detail signal, the gas hold-up was estimated at six radial locations and hence the area average gas hold-up was obtained. A comparison of the gas hold-up values obtained by means of the present LIM analysis and the conventional pressure drop method showed a good agreement, indicating that the larger fluctuations in the column could be attributed to the bubble motions.