The invention discloses a method and an apparatus for analyzing power grid independent control region operation. The method comprises the steps of making statistics on load disturbance information within multiple time periods to obtain a load disturbance level of the power grid; determining an issuing period of the load according to the load disturbance level of the power grid and unit rotary backup capacity, wherein the unit rotary backup capacity is determined through the maximum load of the power grid, a power grid interior capacity parameter and blocked electric power; obtaining a call wire evaluation standard based on the issuing period of the load and the load disturbance level; and obtaining call wire evaluation electric quality based on the call wire evaluation standard through calculation. By adoption of the method and the apparatus, the problem of poor accuracy of the load disturbance statistical method caused by the fact that a load value of a current time point is adopted in the load disturbance level calculation in the prior art is solved.