Calculation method and calculation system of social-network user trust

The invention discloses a calculation method and a calculation system of social-network user trust. The calculation method of the social-network user trust includes: S100, calculation of a trust factor; and S200, calculation of a trust prediction value. By utilizing the calculation method and the calculation system of the social-network user trust of the invention, a trust relationship between users can be established without the need for providing trust attribute information of the users by the users. The calculation method has a very high prediction speed and higher prediction precision; successfully explains technical problems of trust propagation and trust imbalance in trust chains; successfully solves a technical problem that transmission of the trust often fails, and can ensure thattransmission of the trust always succeeds; can effectively filter out malicious users, is higher in security, and thus can ensure that a social network is more secure; and is more wider in a scope ofapplication , and has a hu