In recent years, Taiwan has experienced a recurring problem with food safety. Both the consumers and many famous firms have been negatively affected. Based on the 2014 cooking oil scandal, this study takes the W Group as an example, and explores the relationships among negative publicity severity, corporate reputation, perceived risk and repurchase intention. This study uses a single-factor experiment design: 2 (negative publicity perceived severity: high/low). We used online surveys and collected 407 questionnaires. The main results of this study are as follows: (1) In contrast to low negative publicity perceived severity, high negative publicity perceived severity has higher perceived risk. (2) In contrast to low corporate reputation, high corporate reputation has lower perceived risk. (3) Psychological risk, financial risk and physical risk have negative effects on repurchase intention, but social risk and performance risk do not have negative effects on repurchase intention. (4) Under high corporate reputation, whether negative publicity perceived severity is high or low makes no difference to consumer's perceived risk. However, under low corporate reputation, perceived risk is more obvious under high negative publicity than under low negative publicity.