Imagery movements are movements that are carried out mentally rather than physically. Motor imagery activates brain networks that greatly overlap with those activated by motor execution. Compilation of relevant literatures had shown that the ability about motor imagery and motor execution were declined with aging. Mental practice through motor imagery has proved as an effective therapy for improving motor function in rehabilitation. The potential mechanism might arise from that motor imagery activates brain networks that greatly overlap with those activated by motor execution. Hence, the current study was aimed to discuss about the effect of normal aging on motor imagery ability and also focus on introducing the clinical application of motor imagery training.