This book has been written containing all aspects of modern Extension System and Participatory Extension Approaches, with overall aim to present and disseminate the concepts and methodologies of agricultural extension and its relevance to rural development.The book attempts to explain basic theories and important relationships in the multitude of extension activities in simple language, making it easier to read by avoiding purely technical discussions.The publication highlights the important role of agricultural and rural extension in the backdrop of Sustainable Development Goals and provide all information regarding Participatory Extension Management which will be useful for the students, practitioners, NGOs, Policy Makers and Extension Mangers.