This book contains 7 chapters. Chapter 1 is for introduction of Leave Management System and also introduced about the Existing System. Moreover it is discussed about Limitation of Existing System, Scope, Aim and Objective and Excepted Advantages. Chapter 2 is for Feasibility Study, Operation Feasibility, Technical Feasibility,Economical Feasibility, Cost Feasibility. In chapter 3 is for Tools & Technology Used such as HTML, Features of HTML, PHP, CSS, JQUERY, JavaScript and SQL. Chapter 4 is Data Flow Section which includes Data Flow Diagrams, Data Flow Diagram Symbols and DFD Levels. Chapter 5 is for Screenshots of Database. Chapter 6: Chapter 6 is for Screenshots of Book and Chapter 7 is for Conclusion and Future Scope.