A smart home gateway based on the proposed blockchain has three layers, the device layer, gateway layer, and cloud layer. The first layer, device layer, consists of sensors and devices that collect and monitor data in the smart home network environment through various heterogeneous IoTs that are configured in a smart home. The second layer, gateway layer, stores the data generated by the Device Layer and provides it to users as needed. The third layer, the cloud layer, registers the ID for the gateway and the data processed by each gateway in the blockchain. The blocks are shared so that users can be provided with information anytime and anywhere.