Smart devices have grown to becoming an indispensable part of many individuals' lives. This is due to cloud computing and connectivity, that enabled wireless controls and real-time monitoring that benefits various industries. Soft-computing techniques that has been integrated to many online services such as Amazon allows machine to understand consumer activity and autonomously cater to a personalized experience for each user. In the agricultural industries, smart system is a tool to enhance controls and increase farming precision to improve yield and product quality. Challenges in implementing smart agriculture system are still apparent to this day; (i) Mathematical Modelling of Operation, (ii) Lack of Data and Attention in Smart Farming System, (iii) Complexity of Drying Process. In this paper, state of the art in the smart system in agricultural field, challenges of executing smart farming system are further described and the proposed solution is presented.