Internet of Things (IoT) is a new technology that gained great attention from researchers since it becomes an important technology that promises a smart human being life. It allows human to communicate between objects, machines and every thing. IoT represents a system which consists of things in the real world and sensors attached to combined these things, connected to the Internet either wired or wireless network structure. The main aim of this study is to provide a literature focus on the researchers working with IoT in an agricultural field.