A method and a system for processing network media information are provided. The method includes: collecting historical distribution effect data of network media information; performing attribute improvement processing on the historical distribution effect data by using population attribute data and network media information management data to obtain characteristic attribute data; constructing an effect parameter estimation model corresponding to each attribute of the characteristic attribute data, and training the effect parameter estimation model; estimating an effect parameter value of each audience for target network media information according to the effect parameter estimation model; and selecting an audience whose estimated effect parameter value is greater than or equal to a specified threshold value to form an audience population package to be extracted. The present invention can improve efficiency of extraction, reduce labor cost, and improve precision of distribution of network media information in an audience population package.