The book examines to identify, causes, historical background and frequency of tropical cyclones over the Bay of Bengal for the last 100 years. It is an attempt to analysis the trends of cyclonic frequency during a particular month and year from the period of 1908-2008. Efforts have been made to understand the behavior of the perfect condition and formation of tropical cyclone, and formation area and track of land fall in the Bay of Bengal. GIS method (ArcView3.3 and Arc GIS 9.2 and ERDAS IMAGINE 8.4) has been used to find out the formation area and tracks of tropical cyclones over the Bay of Bengal. Most of the Cyclonic Storm formed in the Bay of Bengal during May to December with the highest frequency in November followed by October. Besides, their formation rate in first four months is very pitiable with no frequency in February. Moreover, most of the Severe Cyclonic Storms are formed during April, May and September-December with the highest frequency in November followed by May. This book also discusses the impacts of tropical cyclone in Bangladesh and assesses the management systems to mitigate the disastrous loss which is directly related to our national economy.