This book was applying the project teaching mode, which is to lead the task driven teaching content, combine theory and practice knowledge, highlights the operation skill training. The whole book is divided into seven projects, each project is decomposed into several tasks. This book mainly introduces basic computer knowledge, Windows XP operating system, Word processing software Word 2003, electronic form Excel 2003, presentation files PowerPoint2003, network foundation and Internet application and commonly used tool software. In view of each project, this book is equipped with corresponded problem sets, and for each task it provides synchronization computer training problem.