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With the improvement of science technology and living standard, people put forward higher requirements for living environment, smart home system came into being. In this paper, it designs a smart home system based on TD-LTE and Android technology, which uses a variety of sensors to monitor the home environment, and sends the information to the mobile phone users through the TD-LTE network. Users can master the home environment situation at anytime and anywhere through the Android client. Because of the use of 4G and Android technology, the data communication rate of the system is greatly improved. The application of the system is increasing. The system can remotely monitor the home equipment, provide a safe, comfortable and convenient living environment, and greatly improve the quality of home life. The hardware of the system is simple, reliable, and is low cost, and is easy to expand.