The description of facial paralysis is usually based on the subjective observation as compared with normal side. It is difficult to objectify and get the statistical analysis of the degree of facial paralysis. We got the normative data for change of the length which were taken from facial expression of 20 healthy volunteers. Lip-length & snout indices as were used the bases of our study parameters and reinforced test parameters to enhance the reliability. We measured the paramerters which were 6 facial landmarks during lip-lengthening & snouting by 3 observers repeatedly as 3 times. We also measured the parameters of facial paralysed patients using the above methods, then we taken the statistically significant parameters after compared with H-B grading system. It was easy and reliable method to measure the length between 6 facial landmarks during lip-lengthening and snouting. Interobserver's and intraobserver's variations were negligible. 4 of 12 lip-length & snout indices were highly correlated with House-Brackmann grading system. The facial expression index based on four indices, had also highly correlated with the House-Brackmann grading system.