Infrared Controlled thermometer is a non-contact temperature measurement device. The main focus of the project is to develop hardware specified design to support the infrared environment; where at the receiver end we shall be able to find the ambient temperature of that particular place. In this project the infrared ray projected from the transmitter activates the phototransistor. The signal derived from the phototransistor is amplified and decoded. This processed signal puts the relay ON. The output from the relay makes the temperature sensor operational which gives an output in form of DC voltage which is equivalent to the ambient temperature in degree Celsius. The transmitter can operate within a range of 2-6 meters.