In this study, two issues concerning processes of prospective memory, that is, the relations between the use of memory aids and metamemory knowledge, and the effect of activities which arise on process till remembered, were examined. Eighty undergraduates were asked to bring four objects they may use in class or test hours two weeks later. The main results were as follows: 1) the relation between use or non-use of memory aids and metamemory knowledge weren't noticed ; 2) according to the importance and the effort made in order to bring the objects manipulated as experimental factors, recognition of importance, memory aids and conversation with others, etc., influenced the subject's performances in various ways, suggesting that conversation with others may have two functions (monitoring and reciprocal supplements) specially in the processes of prospective memory.