The present disclosure provides a network access method, a smart device, a mobile terminal, a cloud server, a networking gateway and a network access system. The method is applied to a smart device and includes: sending relevant network access information to a mobile terminal, the relevant network access information being uploaded to a cloud server by the mobile terminal; receiving a unique network identifier ID from the mobile terminal, and establishing a communication link with a networking gateway via the unique network identifier ID, wherein the unique network identifier ID is acquired by the cloud server from the networking gateway and transferred from the cloud server to the mobile terminal; and sending network access identity information to the networking gateway via the communication link, and joining a network created by the networking gateway after the network access identity information passes verification of the networking gateway.