Through long-term clinical practice，acupuncture treatment on facial paralysis has been generally proved effective；the large number of ancient and modern medical literature also have suggested that acupuncture is beneficial for facial paralysis. However,a scientific basis is still needed to be established to make sure the efficacy of acupuncture be recognized internationally.This study will adopt a series of international practice scales ,such as House Brackmann Scale,Facial Disability Index(FDI),World Health Organization Quality of Life-BREF (WHOQOL-BREF), Cattell Personality Factors (16PF),and Cancellation test to evaluate the role of deqi and neuropsychological factors in the acupuncture treatment for Bell's Palsy.