This study inspects the difference of the retrieval time of autobiographical memory. Two experiments are designed to reveal that whether existing a decision process of odor identification in the proust effect. In the two experiments, subjects were presented with odors, or labels of the odors’ names, or odors of different identification levels. We find that there is interference effect in conditions of label cue with an incongruent odor cue, but not in conditions of a label cue with a congruent odor cue. And we find that there are interference effects in both conditions whereas difficult or easy levels of odor identifications in experiment 2. These suggest that the decision process of odor identification exists in the retrieval of autobiographical memory when evoked by odor. It is showed that the retrieval of autobiographical memory based on odor cuing is a kind of dual-process mechanism, in which the odor itself and the odor identification promote the autobiographical memory retrieval process together.