Agricultural Informatics is a field of practice and education. This is also known as Agricultural Information Technologies and Agricultural Information Science. Applications of IT and Computing in Agriculture and other allied domains dedicated in incorporating better and healthy Agricultural practice supported by various technologies. Agricultural activities is effectively started in worldwide operation of Agricultural Systems for effective and progressive situation. Though there are critical issues and challenges in Agricultural Informatics which include social, technological, finance and economical concern. Agricultural Information Networks is an advanced gift of Agricultural Informatics dedicated in information storage and sharing of information dedicated to the agricultural development. Many countries have their Agricultural Information Networks and Centres and there are international Information Networks too. This chapter described about the impact, role and significance of Agricultural Informatics and highlights the values in developing agro

segments which include pre and post agricultural systems.