The invention relates to the technical field of the Internet, and discloses a security system for Internet original commercial works. The security system comprises an uploading module, a security module, an account management module, an identity authentication module, a certificate module, a verification module, a supervising module, a judicial certifying module, a data storing module and a certification auditing module. According to the security system, identification information of a secured person (that is an author) is adopted as parameters when a global supervision abstract is calculated, therefore, a security file contains the identification information of the author, and the ownership of the original works (comprising the network design works, the network photography works, the network literary works, the network original videos, the network academic works, the original music, the original official documents and the like) is determined. The convenient certificate saving and taking problems of the secured person are solved by synchronously handing the secured security file, global supervision abstract, identification information and national standard time to judicial institutions such as the notary institution, the judicial identification institution, the arbitration commission and the court and combining the judicial certifying module and the certification auditing module.