The work aims to study the process of pupil change when the consumer decides to buy some beverage. The effective proportional data of gaze frequency during the test and the relevant data of intuitionistic 2∑ of pupil dilation in the gaze frequency were analyzed. The tested subject paid more attention to the words and logo on the beverage packaging. According to the effective proportional data related to the gaze frequency and the intuitionistic 2∑ data of pupil dilation, it indicated that gaze frequency and pupil dilation had higher correlation and such correlation was statistically of remarkable significance. Through the analysis on the test data, the tested subject showed higher favorability in 4 beverage samples and it was proved that the neuromarketing was applicable to the marketing research and analysis on the packaged goods. The proposed research method is applicable to not only the beverage packaging, but also all other sorts of packaged goods.