Abstract: A short-term prediction method developed on the basis of the deterministic chaos theory is used to predict the time series of pressure fluctuations in a gas-liquid bubble column with a single orifice.The comparison between the prediction values and the experimental data of the time series of pressure fluctuations in different bubbling processes such as period bubbling,transition bubbling and chaotic bubbling is made.The agreement is satisfactory.In period bubbling,the prediction time is very long and the ability to predict is almost unlimited.However,in transition and chaotic bubbling,the prediction time becomes shorter and the prediction ability becomes limited.These results demonstrate the effectiveness of the chaotic forecasting method in the prediction of hydrodynamics in gas-liquid bubble columns.On the other hand,the results show that the chaotic prediction method can be used to identify chaos in a time series.The ability to predict successfully with this method can be the strongest test of whether or not low-dimensionality chaos is present.