Abstract: In India, an important growing sector is an agriculture. The major challenges in agriculture are crop productivity, soil nutrient level, smart irrigation system, crop monitoring, etc. This paper review the internet of things (IoT) based smart agriculture system using ThingSpeak. The main purpose of this work is to improve the efficiency of the existing irrigation system and to reduce the human intervention for the complete automation of the system. The proposed system consists of raspberry pi, various sensors, a pi camera, and a motor driver. Raspberry pi is the main controlling unit that can control the operation of various sensors and actuators. The soil moisture sensor detects the moisture level in the soil and irrigates the crop in a controlled manner. If there is any variation in moisture level then the sensor will update the observed value and store in the cloud. In a smart monitoring system, the pi camera captures the video and transfers it to the cloud through raspberry pi. Here Pi camera is used to provide live video streaming. All this sensor data is stored in a ThingSpeak cloud. So that we can view it from a remote location using ThingView Free mobile android application. All this sensor data we can also view on the telegram application using bot API.