To improve the reliability and convenience of smart home control function, on the basis of IOT structure, a threelayer smart home system, combined by sensorcontrol layer, networkcommunication layer and service layer, is designed. ZigBee technology, WiFi technology, network communication technology and GPRS is used in the system. By using a phone based on Android platform, we can control the smart home system in shortrange or remoterange. By using different wireless transmission schemes to solve power consumption and reliability issues of the system. The actual test result shows that the smart home system has characteristics of easy to operate, high reliability and low cost, and can be promoted.