Today’s user needs a more fast and mobile way of devices to respond. The necessity of smart devices providing connectivity to the world at each second becomes as mandatory part of our life. Therefore the connectivity of a number of smart and intelligent devices rapidly grows each year. So that according to necessity an autonomous device connection should be required. One of the impressive and powerful solutions is known as the Internet of Things (IoT).The IoT is the network of Man smart physical devices which would be connected to each other that they could interact directly with each other and collect as well as exchange data. In this project, an IoT Gateway system based on ZigBee and Wi-Fi protocols according to the typical IoT application scenarios is presented. Wireless sensor networks (WSN) is the collection of different sensors with different protocols sends data to IoT Gateway which is responsible for the conversion of different protocols in standard format and also do the conversion of internet protocols and finally gave an implementation of prototyping system and system validation.