The food safety problem has become severe and consumer awareness has risen in recent years. Coupled with the popularity of social media, this has led to the rapid spread of misinformation. This study is based on the theory of planned behavior and discusses the public behavior dealing with food-safety messages. We hope to learn what factors affect the precautionary consumer behaviors towards food-safety misinformation, as well as what differences could result from these behaviors according to variances in consumer demographics. In this study, 451 valid questionnaires were collected through an online questionnaire. The results of statistical analyses revealed that use experience, perceived behavior control, ability trust and integrity trust are the four major factors that affect precaution against misinformation. In addition, the results also showed that the higher the education level, the lower the propensity to actively prevent information. People living in south-central Taiwan have stronger precautionary behaviors.