Abstract: As an important component of the power system, the safety and stability of power equipment are of great significance for the reliable operation of the power grid. Accurate state evaluation of equipment helps to timely grasp the operating status of equipment, thereby effectively reducing the probability of equipment failures. By collecting data from equipment operation, constructing a device feature dataset, setting weights for various feature parameters of the equipment, and using TOPSIS for comprehensive evaluation, precise quantitative analysis of the equipment is achieved, which has important guiding significance for equipment operation and maintenance personnel.