Transformers are basic design of device which give power transmission by transforming induced current from one circuit to other circuit. The induced current is often converted step up & step down of current or voltage. This application mainly concentrates on the three phase transformer which are utilized in between electric poles & power transformers. The real time controlling is completed on the fundamental feature like current, voltage, temperature maintained. These features are essential for effective power transmission & long life of industrial transformer. The monitoring & control of the transformer is finished by using Arduino Controller, Sensor which check the current, voltage & maintain temperature by regular observation. There are various transformer maintenance techniques, but this project gives real time monitoring & controlling of transformer by using arduino uno Controller which replace the bulky computers making it as embedded system. The design is to sense features of transformer & send the data regularly to the processor, so this design makes possible to achieve real time control & monitoring of current voltage exceeded & temperature range in the transformer. All data are going to be updated over web server using IOT module on things speak.