The invention relates to a smart home full-house control device and a control method. The control device is provided with a man-machine interaction terminal, a home gateway and a smart home devices control network; the home gateway is provided with a first controller with an embedded radio frequency transmitting-receiving module and an OpenWrt router. The control method includes the following steps that: step one, the man-machine interaction terminal issues a control command according to the need of a user; step two, the OpenWrt router receives the control command and transmits the control command; step three, the first controller with the embedded radio frequency transmitting-receiving module converts the received control command into control signals and transmits the control signals to the smart home devices control network; and step 4, the smart home device control network controls a controlled object according to the control signals and feeds back the running state data of a smart home device to the human-machine interaction terminal. The smart home full-house control device of the invention has the advantages of strong compatibility with original household electric wire layout, wide control range and low cost. The control method has the advantages of high real-time performance, high reliability and wide control range.