By using the scale of word-of-mouth equivalent scale adopted from Sina, Sohu, Mtime and IMDb, 180 female college students were surveyed to measure the word-of-mouth of six selected TV series. It showed that Zhongyong thinking style has the effect on the Word-of-mouth. The effect was validated by using the conditional mean. The empirical results showed that Chinese people tend to give a mark near the mid-point even if they have a clear scoring tendency in their mind. In addition, the negative bias phenomenon reflects the real score of the objects being measured.