목적: The assessment of facial nerve palsy (FNP) is essential for the diagnosis, treatment, and prognosis of patients. Existing facial grading systems (FGS) have some issues for betterment. The aim of this study is to evaluate the usefulness of our new grading system in patients with various degrees of acute peripheral FNP. 방법:Facial photographs (resting, mouth extension, eye closing, eyebrow lifting) of 5 healthy people and 35 FNP patients were analyzed using PC-based FNP grading system (FGS 2.0) that we developed. FGS 2.0 classified FNP area into 3 components - mouth asymmetry ratio (MAR), closing eyes asymmetry ratio (CAR), and eyebrow asymmetry ratio (EAR). Ratio of asymmetry between two sides was measured for MAR and EAR. Then, MAR, CAR, and EAR were weighted with the ratio of 532 for integrated values of FNP. In addition, FNP degrees of the 40 cases classified using House- Brackmann grading system (HBGS). 결과:Mean MAR and EAR for healthy people were 0.94 (0.92-0.96) and 0.99 (0.98-1.00), respectively, which showed statistically significant differences compared with each grade of FNP patients (p<0.001). Measured values of MAR and EAR in FNP patients were compared according to their grades classified by HBGS. MAR between HBGS II (0.94) and III (0.65) had a significant difference (p<0.001), whereas EAR showed a significant difference between HBGS I (0.99) and II (0.93) (p=0.007). CAR had a difference between HBGS III and IV (p=0.026). Integrated values of FNP showed a linear proportion according to degrees of FNP and there were significant differences in all combination between HBGS II and V. 결론:Results using PC-based FGS program showed characteristics by grade of HBGS. Further revaluation of FGS 2.0 is needed for standardized assessment of FNP.