The invention discloses an electric power system safety stabilization prevention control rolling decision method in consideration of a real-time plan and aims to solve a problem that reliability is difficult to guarantee as the electrical network operation time corresponding to on-line prevention control decision results in the prior art is earlier than the present electrical network operation time. The method employs safe, stable and conservative principles, evaluates use/stop states and operation information of primary and secondary equipment in future according to historical, present and real-time plan data, influence of an evaluation error of a future electrical network operation state on control decision result reliability is reduced, through safe and stable evaluation and prevention control decision calculation of the electrical network operation state in future, the electrical network operation time corresponding to the control decision results is made to later than control decision result obtaining time, so control decision result reliability is improved.