Smart home control method and system

The invention provides a smart home control system and method, and relates to the technical field of equipment networking control. The method comprises the following steps that: gateway equipment detects a heartbeat packet in a network in real time: if the heartbeat packet is detected, the gateway equipment establishes communication connection with a cloud platform, receives a control instructionsent by the cloud platform so as to control each terminal equipment, and receives a query instruction sent by the cloud platform so as to obtain real-time state information of each terminal equipment;if the heartbeat packet is not detected, the gateway equipment counts the duration of not detecting the heartbeat packet, compares the duration with a preset duration threshold value; and if the duration is not less than the duration threshold, the gateway device establishes a communication connection with the local host, receives a control instruction sent by the local host to control each terminal device, and receives a