In the age-prospective memory-paradox, the superior performance of the elderly in the daily prospective memory tasks in natural context, contrast to the young subjects, has been particularly noticeable. Some researchers discussed the subjective factors of this phenomenon from the following aspects: (1) the level of motivation and sense of responsibility. Some results(Rendell & Thomson, 1999; Kvavilashvili & Fisher, 2007; Aberle, Rendell, Rose, McDaniel, & Kliegel, 2010) showed that the level of motivation of the old is higher than that of the young, another study (Cuttle & Graf, 2007) manifested that this advantage is related to the higher responsibility of the elderly; (2) lifestyle factors. Some researchers(Freeman & Ellis, 2003; Schnitzspahn, Ihle, Henry, Rendell, & Kliegel, 2011) considered that the daily prospective memory task advantage of the old in the natural environments is associated with the state of their lives，that is, most of the elderly have already retired with smaller tasks pressure, which enables them to accomplish the prospective memory task better; (3) external factors prompted. Previous researches (Phillips, Henry & Martin, 2008; Masumoto, Nishimura, Tabuchi & Fujita, 2011) indicated that the elderly using more of external cues might improve their prospective memory performance in the natural context. Prospective memory advantage of the elderly in the natural situation also can be reflected in the comparing of tasks in natural /laboratory situation. Based on previous researches, It can be concluded that the performance of the elderly in daily tasks is higher than that of the young in natural situation, while it is directly opposite in the cognitive tasks, the same as in cognitive tasks in laboratory situations. This suggests that the mechanism of the advantage of the elderly in prospective memory is related to the nature of the tasks rather than the scenarios. The mechanism of the advantage of the elderly in daily prospective memory might be further confirmed by meta-analysis and mediating effects testing in the future researches.