<p>The relationship between emotion and moral judgment remains uncertain. One aspect to consider is whether moral intuition includes emotional intuition and automatic moral cognition. Another important area for research is the influence of emotion on late-stage moral reasoning. In this study, visual mismatch response (vMMR), an event-related potential component that indicates the brain’s automatic detection of environmental changes, was employed to investigate the temporal processes of emotion influencing the automatic processing of moral judgment. The study utilized a passive oddball paradigm that presented frequently occurring low-arousal neutral standard stimuli, along with infrequently occurring deviant stimuli. These deviant stimuli were categorized as moral deviants, emotionally arousal deviants, and double deviants. The findings revealed that in the early stage, both moral deviants and arousal deviants induced vMMR, with their amplitudes being additive. In the late stage, moral deviants failed to elicit vMMR, whereas both arousal deviants and double deviants evoked vMMR. These results suggest that individuals can automatically detect changes in the moral stimulus environment. Furthermore, moral intuition involves both automatic cognition and emotional intuition, supporting the cognitive–intuitionist model. Moreover, the results imply that emotion influences late-stage moral reasoning.</p>