In this paper, we propose a mobile smart home system includes a high-sensitivity signal interface transmitting end, a low-cost signal interface receiving end, and a mobile APP interface device connected the two ends for the user to control the smart home. After receiving the signal of the signal transmitting end, the signal can be sent to the receiving end through the APP interface device according to the user request to achieve the purpose of realizing the smart home system. The present invention has the advantages of low cost, high sensitivity and convenient operation.