The invention discloses a system for bearing capacity evaluation of a power grid enterprise and relates to the field of enterprise sustainable development management technical research. The system comprises an enterprise operation and management module used for setting enterprise operation and management indexes and conducting weighting and assignment operation on enterprise level basic data, a standard engineering converting module used for setting standard engineering converting indexes and converting engineering project essential data, a project team management module used for setting project team management indexes and conducting weighting and assignment operation on professional basic data, a bearing capacity evaluation module used for establishing a bearing capacity evaluation model and obtaining a preliminary bearing capacity evaluation result and a bearing capacity evaluation and analysis module used for outputting a final bearing capacity evaluation result. The invention further provides a method for bearing capacity evaluation of the power grid enterprise. The professional ability of an engineering project in bearing area power grid construction of the enterprise is quantitatively analyzed and dynamically evaluated, so that the power grid construction capacity and the professional management level of the enterprise are improved.