The invention relates to the technical field of wireless communication, and particularly provides a network communication method used for a network system. The network communication method aims at solving the technical problem of long tree network communication time. For the purpose, the network communication method comprises the steps of sending a data reporting instruction to each node device by a base station in a broadcasting form; after the data reporting instruction is received, sending reported data to the base station through a relay device chain by a node device in a furthest channel layer; and sending the reported data to the base station directly or through the relay device chain by a node device in the non-farthest channel layer after a node device in the next channel layer finishes data reporting. The technical scheme can greatly reduce communication time of the tree network.