Action memory is a type of memory involved with better awareness and enactment. It not only emphasizes the influence of better awareness on memory, but also stresses the integration of physical enactment on memory. The early researches mainly paid attention on the action memory as well as the affected factors through the SPT paradigm, and proposed four theories to account for the enactment effect. However, all of the theories could not reveal the processing mechanism of action memory completely as each of the theories focused on the enactment effect from different angles. Some of empirical researches attempted to explore the mechanism of action memory from the source monitoring. But, the results did still not lead to an agreement so far.