In recent years, because the study of plant memory provides a new perspective for further understanding the ecological processes, such as population distribution pattern, community assembly, community succession, and so on, it has attracted the attention of ecologists. In this paper, based on the introduction of concepts of ecological stress memory, epigenetic memory, ecological memory, and soil memory, the latest plant memory research developments in ecology are reviewed, and a noteworthy field is also proposed. It is hoped that this review will provide a new perspective to elucidate these ecological processes.