Embodiments of the invention provide an ADPSS-based simulation model generation method and system. The method comprises the following steps of: obtaining a to-be-simulated file and analyzing the to-be-simulated file to obtain corresponding analysis parameters, wherein the analysis parameters comprise equipment types, equipment parameters and topological structure information between the equipment;converting the equipment types, the equipment parameters and the topological structure information into intermediate data satisfying a format requirement of ADPSS electromagnetic transient data according to the format requirement of the ADPSS electromagnetic transient data; and generating an ADPSS electromagnetic transient simulation model according to the intermediate data, the to-be-simulated file and a preset computational analysis demand. The system is used for executing the method. According to the method and the system, the to-be-simulated file is analyzed and converted to the intermediate data satisfying the format requirement of the ADPSS electromagnetic transient data, and the ADPSS electromagnetic transient simulation model is generated according to the intermediate data, so that format conversion is automatically carried out on the to-be-simulated file to generate the simulation model, and the ADPSS electromagnetic transient simulation model generation efficiency is improved.