The invention discloses an electronic analysis method and system of power grid stability control regulation for real-time dispatching operation. A power grid stability control regulation electronic analysis model is established, wherein the model is expressed in the form of limit trees by taking the upper and lower limit control requirements of the section active power or central point voltage aslimits, and each limit tree includes a data layer, a rule layer and a limit layer; rules are input, the operation modes and the final limit values are automatically matched by using the limit tree model according to the remote signaling and telemetry values of grid equipment, the working condition of the equipment and the specific changes of the power grid model, and the operation mode and final limit value of the current power grid section are determined; when the operation mode of the power grid changes, a new section is generated and the limit is updated automatically; and when the final limit value is exceeded, an alarm is issued. The problem that the determination of the power grid operation control boundary at present still mainly depends on an artificial and paper-version stable operation regulation is solved, the automation level of power grid operation control is improved, the operation efficiency is increased, and new energy consumption is promoted.