Monitoring and control of greenhouse environment play an important role in greenhouse production and management. Greenhouse monitoring and controlling project is used to measure the various parameters like Temperature, Humidity and Light and to display them on a LCD. Temperature, Humidity and light are sensed by respective sensors. Sensor output is amplified and given to ADC. Micro-controller controls these parameters and keeps them at some predefined levels using relay interface. Appropriate environmental conditions are necessary for optimum plant growth, improved crop yields, and efficient use of water and other resources. Automating the data acquisition process of the soil conditions and various climatic parameters that govern plant growth allows information to be collected at high frequency with less labor requirements. The existing systems employ PC or SMS-based systems for keeping the user continuously informed of the conditions inside the greenhouse. This makes the proposed system to be an economical, portable and a low maintenance solution for greenhouse applications, especially in rural areas and for small scale agriculturists The objective of this project is to design a simple, easy to install, micro-controller based circuit to monitor and record the values of temperature, humidity, soil moisture and sunlight of the natural environment that are continuously modified and controlled in order optimize them to achieve maximum plant growth and yield.