Contemporary behavior interventions focused on upper limb training such as robotic-assisted training and constraint-induced movement therapy have been proven to promote motor recovery. However, the improvement is often of limited in practical significance. Mirror therapy (MT) and transcranial direct current stimulation (tDCS) on brain based on similar principle of utilizing brain plasticity have shown benefits in promoting motor function recovery and are particularly easy to apply in different settings. tDCS activates a bulk of neural circuits in a non-specific way, coupling tDCS with MT could steer plastic process toward a functional direction. However, current evidence is insufficient to support the efficacy of tDCS as an adjuvant to upper limb training, and long-term effect has yet to be explored.