The invention discloses a method for protecting Internet user privacy through a third-party platform, and relates to an Internet user, a service party and a third-party privacy protection platform, wherein the Internet user can enjoy related service through the Internet, the service party is one or more service providers that Internet service involves, and the third-party privacy protection platform is a credible neutral institution that protects privacy safety of the Internet user. The user can obtain unique identity identification after being authenticated by the third-party privacy protection platform, personal privacy information is management through the platform, and privacy protection limits of authority can be set according to service situations and personal preference. When the user applies for a service, only identity identification needs to be provided to the service party, the third-party privacy protection platform verifies the identity of the user and feeds back a result, and if user information-related service is needed, the service party can submit an application to the third-party privacy protection platform, the platform processes the application according to user privacy limits of authority setting and related regulations and restraints.