A network connection method applicable to a router , the method comprising: S101: the router receiving a first dynamic password from a server ; S102: the router receiving a second dynamic password from a mobile terminal and comparing the second dynamic password with the first dynamic password; S103: when the comparison is matched, establishing a connection, and sending a first result signal to the mobile terminal ; and S104: the router clearing connection information generated by the connection after the connection is established, wherein after the step (S101) of the router receiving the first dynamic password from the server , characterized in that the network connection method further comprises: S202: the router generating a first master key according to the first dynamic password; S203: the router generating a first random number and sending the first random number to the mobile terminal ; S204: receiving a third random number and a first temporary key from the mobile terminal and generating a fourth random number, wherein the first random number is identical to the fourth random number; S205: generating a second temporary key according to the third random number, the fourth random number, and the first master key; S206: comparing the second temporary key with the first temporary key; and S207: when the comparison is matched, establishing the connection, and sending a second result signal to the mobile terminal . S101: the router receiving a first dynamic password from a server ; S102: the router receiving a second dynamic password from a mobile terminal and comparing the second dynamic password with the first dynamic password; S103: when the comparison is matched, establishing a connection, and sending a first result signal to the mobile terminal ; and S104: the router clearing connection information generated by the connection after the connection is established, wherein after the step (S101) of the router receiving the first dynamic password from the server , characterized in that the network connection method further comprises: S202: the router generating a first master key according to the first dynamic password; S203: the router generating a first random number and sending the first random number to the mobile terminal ; S204: receiving a third random number and a first temporary key from the mobile terminal and generating a fourth random number, wherein the first random number is identical to the fourth random number; S205: generating a second temporary key according to the third random number, the fourth random number, and the first master key; S206: comparing the second temporary key with the first temporary key; and S207: when the comparison is matched, establishing the connection, and sending a second result signal to the mobile terminal . S202: the router generating a first master key according to the first dynamic password; S203: the router generating a first random number and sending the first random number to the mobile terminal ; S204: receiving a third random number and a first temporary key from the mobile terminal and generating a fourth random number, wherein the first random number is identical to the fourth random number; S205: generating a second temporary key according to the third random number, the fourth random number, and the first master key; S206: comparing the second temporary key with the first temporary key; and S207: when the comparison is matched, establishing the connection, and sending a second result signal to the mobile terminal . <EOS>