Network connection method, device and system

The invention discloses a network connection method, device and system. The network connection method comprises the steps: obtaining a current network environment feature of an electronic device whenthe electronic device is currently connected with a network and a historical network environment feature of the electronic device when the electronic device is connected with the network before; obtaining a matching degree analysis result by analyzing the matching degree between the current network environment feature and the historical network environment feature; and judging whether the electronic equipment is allowed to access the network or not according to the matching degree analysis result. According to the network connection method disclosed by the invention, the identity of the user is identified by utilizing the characteristic that the network environment feature where the user is located is difficult to forge when the user is connected with the network, so the security of network connection is improved,