<p>Beliefs about emotions have been gaining attention as a significant variable influencing emotional regulation and psychological health. This research conducted two studies aimed at delineating the characteristics of emotion beliefs among Koreans. In the first study, we validated the Emotion Beliefs Questionnaire (EBQ) developed by Becerra et al. (2020) using a Korean sample (<i>N</i> = 255). The Korean version of EBQ (EBQ-K) revealed a three-factor structure encompassing'general emotion controllability,''negative emotion usefulness,' and'positive emotion usefulness,' with the scale's utility confirmed. In the second study, individual differences in Koreans' emotion beliefs were identified through latent profile analysis (<i>N</i> = 314), considering the factors of'general emotion controllability,''negative emotion usefulness,' and'positive emotion usefulness.' Moreover, the study explored the predictive role of emotional invalidation in classifying latent groups as an influential factor. The findings indicate variations in the levels of emotion regulation and emotional problems based on the characteristics of these latent groups. This suggests that having adaptive beliefs about emotions confers advantages in terms of emotional regulation and psychological well-being.</p>