计算机辅助设计(CAD-Computer Aided Design)指利用计算机及其图形设备帮助设计人员进行设计工作。 在设计中通常要用计算机对不同方案进行大量的计算、分析和比较，以决定最优方案；各种设计信息，不论是数字的、文字的或图形的，都能存放在计算机的内存或外存里，并能快速地检索；设计人员通常用草图开始设计，将草图变为工作图的繁重工作可以交给计算机完成；由计算机自动产生的设计结果，可以快速作出图形，使设计人员及时对设计作出判断和修改；利用计算机可以进行与图形的编辑、放大、缩小、平移和旋转等有关的图形数据加工工作。-Computer-aided design (CAD-Computer Aided Design) refers to the use of the computer and its graphics device help designers design work. Usually use the computer in the design of different programs a lot of computation, analysis and comparison, in order to determine the optimal solution　design information, whether digital, text or graphics, and can be stored in the computer s memory or external deposit, and can be quickly retrieved　designers usually start with a sketch design sketch into a working drawing heavy work can be handed over to the computer to complete　design results automatically generated by a computer, you can quickly make graphics designers timely manner judgment and modify design　computer can be carried out with the graphics editing, zoom in, zoom out, pan and rotate graphics data processing work.