Abstract
This paper aims to clarify and reformulate the conceptual relationship between emotions and moods in light of recent researches in philosophy and cognitive psychology. I argue that the mechanism of mood may produces cognitive biases that affect the appraisals involved in emotions, whereas the mechanism of emotion may produce physiological and behavioral responses that affect the energy level being monitored by mood. These two distinct mechanisms can affect each other repeatedly and continuously, which form the mood-emotion loop. I argue that this model may help explain the interaction between emotions and mood, and may shed light on the understanding of the regulation of emotion and mood disorders.