This book consists of four parts, totally 18 chapters. It chiefly introduces the basic knowledge of AutoCAD 2011 and electronic and electrical design, two-dimensional drawing, graphics modification, characteristics and applications of layers, segment, text and table, three-dimensional drawing and printing output of 3D drawings, the drawing of the commonly used electronic and electrical components, three-dimensional drawing of the electrical components, drawing of digital circuit diagram, mechanical electrical design, construction electrical design, electro-hydraulic control system design and motor control design.