Understanding users’ real emotions when they use emoji is important for future research. At present, it is difficult to accurately measure participants’ true reactions through self reporting. Categorizing emotions by amassing a corpus using big data is unable to depict users’ complex emotions such as are expressed by emoji at a more detailed level, for example emotions such as shame, anger and so on. Therefore, we hold the opinion that in the future,researchers can use some psychological methods in the corpus test to measure the physiological indexes of participants with professional equipment such as nuclear magnetic resonance, electroencephalography and multipurpose polygraphs to depict users’ real emotions more accurately.