A fastener model representation device in a fastener aid design system includes at least one fastener model with an information storage module that stores three-dimensional information of the fastener model. The information storage module stores related information of the fastener model such as a name, an identification number, weight, coordinates and materials of the fastener model, and can include at least one of installation standards, connected parts, amendment information, heat treatment, detail parameters and mechanical properties of the fastener model. The related information and the naming information are shared by the fasteners of the same class in a manner of a digital dictionary. The three-dimensional information is stored in a local storage area of the fastener model and may be directly accessed, thereby providing a user with various graphic representations and statistical information of the fastener model.