A system for adding a smart home device includes a first mobile phone configured to set, using contact information of a second user, a second mobile phone allowed to make a call to the smart home device, the second mobile phone is configured to automatically add contact information of the smart home device and make a voice call or a video call with the smart home device using the contact information of the smart home device, such that a user is configured to enable, in a setting manner of the smart home device, a friend to automatically discover the smart home device, and then make an audio call or a video call.