This is a textbook, written on the basis of new syllabus recommended by 4th Deans committee. This book is majorly for undergraduate and postgraduate students in extension education at Home Science College. It shall also serve as reference book for extension students of Agriculture, Veterinary, Forestry, Fisheries, Basic Science etc. in the Universities, College and Institutes. It shall also serve as handbook for Government Departments, Non- Government Organizations, Rural Banks and Cooperatives, Krishi Vigyan Kendras etc. and help them in extension works. This book describes various concepts and methods for extension of information and researches for rural development and solving problems of rural area. This book provides well documented text that describes the role of extension agents in raising the overall living standards of rural families by imparting knowledge and skill, offering technical advice, helping to identify problems and finding opportunities, disseminating information, supporting group formation and planning developmental programmes.