The invention relates to a root service system for personal identity authentication. According to the invention, an internet technology, a telecommunication technology and a mobile phone sensing identification technology are utilized and a mobile phone number is corresponded to a personal identity card, so that a root service system for personal identity authentication is established. Therefore, when the invention is applied, a unified and comprehensive solution scheme is provided for solving problems that have been puzzled the society about social management for long time, wherein the problems include identity examination, ID-based ticket purchase, and network ID-based registration and supervision and the like; besides, support and guarantee service for third-party legal real-name authentication can be provided for network electronic commerce application like on-line visa, online shopping and electronic payment and the like; especially, a powerful backup is provided to help the government realize individual unified management on medical insurance, endowment insurance, unemployment insurance, insurance against injury at work and maternity insurance, housing fund, retirement fund, medical fund, tax and medical fee and the like. The root service system provided in the invention has advantages of convenience and practicality as well as security and confidentiality. Besides, the system has good compatibility to the prior application art; therefore, revolutionizing changes on network application will be brought about for comprehensive development of mobile commerce.