The main thing is the Internet. If the mobile phone can not be connected to the Internet, it can not achieve the control of home appliances. For example, on the desktop of the iPhone, the HomeKit APP, the icon is \"family.\" The concept behind HomeKit is that Apple gives consumers an iOS device and controls their home products through an app, or through a common UI interface of its partner apps. The APP can be controlled within a local area network, but voice recognition requires a phone to be connected to the Internet. Siri in Apple's mobile phone will upload the voice data to the cloud after recognition, and do recognition processing, and then send to the iPhone. At this point, the phone will send instructions to the gateway through WiFi. After receiving the information, the gateway processes the information content and controls the home appliances. If there is no infrared device, other remote control software APP is the same.