This book is an introduction for a new proposed model that may help to enhance agile software development methodology using cloud computing infrastructure, by addressing the major problems and challenges facing agile software developing methodologies and finding concrete solutions from the existing technical ground available, the new model suggests to use the cloud computing infrastructure indeed hybrid cloud with applying some technologies in different levels. Proceed by investigate about the current state of the art in agile software development methodologies and demonstrate the definition and background of cloud computing, detailed analysis of agile software development process, models, theories, strategies, problems and risks. And also it presents the related works of using agile software development methods with cloud computing.