This book consists of five parts, totally 21 chapters. The introduction part chiefly introduces related concepts, industry application, new functions, installation and booting, basic manipulations and pre-mapping setting of AutoCAD 2011 in the first part. The 2D drawing part, it chiefly introduces the drawing of basic 2D graphics, complex 2D graphics, the editing of graphic object, etc. The third part chiefly introduces the use of text and tables, size marking, segment application, layer creation and editing, etc. In term of 3D drawing, it chiefly introduces the foundational knowledge of 3D drawing, the drawing and editing of 3D graphics and the display effect of 3D graphics. Moreover, the book provides four cases to introduce the applications of AutoCAD in terms of mechanical design, architectural design, decoration design and electrical and electronic design industries.