Some investigators have proposed that self referent process mediated the presence of mood congruent effect. Self referent tasks are separated self descriptive task (participants decide whether a stimulus word is self descriptive) and autobiographical recall task (participants retrieve an autobiographical memory relates to a stimulus word). Many investigators used only self descriptive task. This study was investigated mood congruent effect by using autobiographical recall task under natural occurred mood condition. One hundred undergraduates participated in this experiment. Participants were divided for positive and negative mood group by the result with mood score. Each condition was presented with stimulus words per 4s. Stimuli were 30 pleasant and 30 unpleasant trait adjective words. Participants judged they could recall any of their autobiographical memory related to the word. Result showed positive and negative mood group occurred mood congruent effect in recall rate. Using autobiographical recall task showed mood congruent effect under natural occurred mood. This result differed from using self descriptive task under natural occurred mood. We need to investigate mood congruent effect in each self referent task.