Abstract: Objective:To explore the efficacy evaluation of nurturing hair products by dermoscopy image analysis technology.Methods:We randomly collected 58 patients who had been suffering from androgenetic alopecia,and had been willing to accept the product trial after being informed.Then we obtained the macro images and micro images by dermoscopy as well in 0 weeks,4 weeks,8 weeks and 12 weeks.After observing these images,we measured the changes of numbers of terminal hair and its density parameter.In addition,we set up the experimental group and control group,and the efficacy was evaluated by own control.Results:There were 32 cases in experimental group,the effective rate of which was 84.37%,while there were 22 cases in control group,the effective rate of which was 86.36%.According to the results of comparison between the two groups,the efficacy of the product,along with the changes of parameter,as time went by,have shown great significance (P<0.01).Conclusion:We have adopted dermoscopy image analysis technology to objectively evaluate growth of hair and the efficacy of nurturing hair products.Besides,we have discussed the standard determination of efficacy by dermoscopy,which have obtained satisfactory results in clinic.Our research has been noninvasive,objective and simple,which has been able to be the auxiliary means for fundamental research of hair and efficacy evaluation of nurturing hair products.