The primary issue of greenhouse is on the horticulture which is to manage the greenhouse environment optimally in order to comply with the economic and environmental requirements. The controlled parameters in a greenhouse are watering system, humidity and temperature sensor that was automatically function when it is integrated with microcontroller as the main brain of the project. This project will be able to automatically water the plants when the control temperature and humidity in a greenhouse is increases. This project successfully able to improve the watering system from manual to automatically function when the sensor detected the increase of air temperature. Increases of heat and humidity in plantation have to be controlled and watering is necessary to provide water in order to ensure the plant growth healthily and this project also will prevent the excessive use of water to the crops and the wastage of water can be avoided.