Stroke is the leading cause of motor dysfunction in modern society. Aiming at the key problems that the means of traditional rehabilitation training of passive intensive limb motion is relatively simple, the mechanism for recovery is unclear and the training strategy lacks guidance with objective evaluation indexes, an experiment task canonical form of right upper limb motor imagery fusing functional electrical stimulation with different intensity (including supraliminal and subliminal stimulation and nonstimulation) was designed. Seventeen righthanded healthy young subjects were recruited to participate in various experiment tasks. Electroencephalogram timefrequency features and statistical results show that there are significance statistic differences in the energies of alpha band at C3/C4 leads and beta band at CPz lead between the stimulation and nonstimulation modes, and there is significant activation difference in the energy at alpha band only at supplementary motor cortex in supraliminal and subliminal stimulation modes. The above results preliminarily prove that the rehabilitation training mode of motor imagery combining with FES is more conducive to motor cortex activation, and it may be deduced that FES could enhance the cortex neural activities of alpha rhythm at supplementary motor cortex, primary motor cortex and sensorimotor cortex, as well as the cortex neural activities of beta rhythm at sensorimotor cortex.