Fuente: Wipo "BigData" The invention relates to a big data anonymity protection method and system serving digital medical treatment, and medical user treatment big data anonymity can be carried out by means of a small amount of user portrait description. Therefore, the anonymous protection processing is almost not interfered by the proportion of the medical user treatment big data used for carrying out anonymous protection reference in the medical user treatment big data having the medical user information anonymous demand; even if the proportion of the medical user doctor-seeing big data for anonymous protection reference in the medical user doctor-seeing big data with the medical user information anonymity demand is not too large, the accurate anonymity of the medical user doctor-seeing big data can be ensured as much as possible, so that the anonymity efficiency and accuracy of the medical user doctor-seeing big data can be improved.