The invention discloses a smart home system. The smart home system includes a control end, a smart home gateway and home appliances, wherein the control end, the smart home gateway and the home appliances are electrically connected with one another; the control end comprises a smart sensing module, a smart terminal, a server, an IPAD, a smart phone and a computer; and the intelligent home gateway includes a central control center as well as a communication module, a control module and an expansion module which are all electrically connected with the central control center, wherein the central control center is provided with a built-in Z-wave module, the communication module includes an Ethernet module, a WIFI module, a GPRS module and a sub-network penetrating module, the control module includes a smart plug-in socket, a smart valve mechanical arm, a smart motor control module and a smart lamp light control module, and the expansion module includes an RS232 bus interface, a USB interface, a JTAG interface and an intelligent cloud platform interface. With the smart home system provided by the technical schemes of the invention adopted, unified and remote control, bidirectional feedback and the like of the home appliances can be realized. The smart home system has the advantages of simple structure, high universality, high compatibility, low power consumption and low cost.