ASEAN countries are agricultural country and Rice is the main food of the country. The watering of plant is a major factor in agriculture and can impact on the productivity and product yields. In this paper, Design of IoT based Smart Watering System Using Long Range (LoRa) Network is proposed to promote the smart agriculture in the country. The system collects data from paddy field using IoT devices and stored data in cloud server. That will design and monitor the weather stations, sensor nodes, valve-control nodes, and a controller node which is based on the concept of mesh-topological, low-power wireless network platforms.