Abstract：Episodic foresight is a psychological construction in which individuals project themselves into the future in order to experience future events in advance. By combing the influence of episodic foresight on intertemporal choice, this paper discusses the moderating effects of individual's age, working memory ability and self-relevance of foreseeing content. On the basis of this, we point out the emotion-of-episodic-prospection hypothesis and the attentional mechanism of "focusing on the future". On the one hand, the emotion induced by episodic foresight affects delay discounting; On the other hand, episodic foresight can change decision preference by influencing individual waiting time cost and weight of delayed benefits. In the future, individuals with mood disorders can be included in the research object, specific prospective emotion can be subdivided, normative control conditions can be established, and neural mechanisms can be further explored.