Since the limitations for the presentation of information on the internet, shopping online makes consumers feel cognitive dissonance more easily compared with traditional shopping. While experiencing cognitive dissonance after shopping, consumers would search and browse the internet for word-of mouth in order to rationalize their purchase behavior. However, there seems little research for the impact on consumers¡¦ feelings by online word-of-mouth during post-purchase. Therefore, this study is going to be focused on the influence of searching online word-of-mouth on consumer post-purchase cognitive dissonance level, consumer attitudes and intention s to spread negative word-of-mouth. This study is adopted an experiment to understand the effect of reading wording-of-mouth on consumers. The degree of consumer cognitive dissonance is measured by the comparison between the difference of consumer expectation and their feelings in actual products. The word-of-mouth design is applied to content analysis to understand the actual word-of-mouth and thus this is resulted in an online word-of-mouth contented ¡§more negative messages and less positive ones¡¨. According to this research, there is no significant difference between cognitive dissonance and consumer attitude after reading the word-of-mouth in the high degree of cognitive dissonance case; nevertheless, the intention to spread negative word-of-mouth would be significantly decreased. On the other hand, in the low degree of cognitive dissonance case, after reading word-of-mouth, cognitive dissonance would be significantly increased, and consumer attitude could be significantly decreased and negative word-of-mouth intention will significantly increase.