One of the Precious and important resource in the earth maybe water. Now a days people need everything happen smarter other than olden days techniques used. In this paper Internet of Things (IOT) Based on the concept that to define energy conservation in tank level water monitoring system(sense and monitor). The Main objective is to have a sensor which detects the level of water and it should notify the user about the water level which is currently available in the tank. The Ultrasonic Sensor is placed at the top of the tank in which we will measure the level of water and the if the distance of the water from the sensor gets increased, it means that the water in the tank gets low and finally after reaching to an extent the system should notify a warning message to the user. The Major requirement would be Ultrasonic sensor which senses level of water (in distance)from the top of the tank to the bottom of the tank. The sensor is connected to the system using the Wi-Fi of NODE MCU (ESP8266) .The Blynk library is installed and connected in the arduino. The Blynk application is used to get the values and the notification send to the mobile for the user purpose. The user can get notified that the tank is empty and can take further steps to fill the water in the tank.