An LED lighting device, and a smart home control system and method are provided. A smart terminal is configured to send a control instruction to an LED lighting device and to receive at least one sound pulse signal from the LED lighting device to remotely control one or more household electrical appliances that have an infrared remote control function. The LED lighting device includes a Wi-Fi module, an infrared remote control module and a sound pulse detection module. The Wi-Fi module receives the control instruction and transmits the control instruction to the infrared remote control module. The infrared remote control module converts the control instruction to an infrared control signal. The sound pulse detection module detects a prompt tone when the one or more household electrical appliances are turned on remotely, converts the prompt tone to a sound pulse signal, and sends the sound pulse signal to the smart terminal.