Embodiments of the present disclosure provide a method and device for recognizing a state of an electrical device. The method includes obtaining an image of the electrical device in a field, wherein the electrical device is disposed on a plane of a predefined polygon in the field; obtaining an original appearance image of the electrical device in the field by recovering the predefined polygon in the image to an original appearance of the predefined polygon; and determining the state of the electrical device based on the original appearance image of the electrical device in the field.