The invention discloses a method and a system for electric power system simulation scene modeling, and the method comprises the steps: providing model library support for simulation scene modeling through a model layer, and the model layer comprising a meta model and a combination model; specifying a modeling element and a modeling representation method through a meta-model; wherein the combination model is a function template constructed based on a meta-model; providing a text description file of the simulation scene for the adaptation layer through the description layer; the description layer determining network core elements through a user-defined model and being used for shielding difference of modeling of different emulators; the description layer using a model library to describe thenetwork topology and parameters, and using the semantic function of the abstract model to avoid the original model mode from describing the network elements one by one; converting the text description file into a simulation file suitable for a simulator through an adaptation layer; the adaptation layer compiling model conversion middleware according to a unified interface standard and registeringthe model conversion middleware to the analyzer management module; and the parser management module being used for expanding according to semanteme, and mapping the entity model to a target platformmodeling specification.