The invention relates to a system for analysing physico-chemical properties of a skin surface, comprising: at least one contact sensor for applying to said skin surface to be analysed in order to determine specific information, once or twice a day, about a particular area of the skin surface； at least one environment sensor designed to accompany a user throughout the day and to measure, throughout the day, at least one external parameter acting on said skin surface； and a processing unit interfaced with the contact and environment sensors, said unit being fitted with analysis means allowing the determination of physico-chemical properties of the skin surface to be analysed, from signals generated by the contact and environment sensors.
