This study included two experiments using the classical double-task PM paradigm. The aim is explored that sufficient exposure to the target prior to its being designated as such may aid detection of that target, thereby improving PM in the face of demanding ongoing activities. The results of experiment 1 showed that using both the strict and lenient criterion method, the main effect of target pre-exposure was significant. The results of experiment 2 showed that using both of the strict and lenient criterion method, PM score performed decreasing tendency from high to low level of target pre-exposure. In conclusion, the current study demonstrated that the targets exposing prior to the PM instructions generally improved PM performance, and target pre-exposure eliminated nearly all failures to remember the intended action. PM performance became better as target pre-exposure level rises. According to these results, the simple activation model was supported.