This book is a kind of workbook on AutoCAD two dimensional drafting and three-dimensional architectural modeling. In addition to a great number of typical exercises on architectural drafting, this book indicates the drafting procedures to some difficult exercises. The exercises in the book are arranged in a systematical and thorough way from introducing easy ones to resolving difficult ones. Both the exercises on modeling method of basic commands and the comprehensive exercise of relative difficulty are selected in the book. It is of high value for the beginners and some senior readers to regard this book as reference material. This book can serve as the supplementary teaching materials for some machinery courses at the colleges and universities and for the CAD training classes; and it can be regarded as the exercising materials for the engineering designers and computer hobbyist to learn AutoCAD.