Method for updating system message and network device

The present invention is applied to the technical field of communications, and provided are a method for updating a system message and a network device. The method comprises: a network device deciding to send a first system message, the first system message being sent by the trigger of cell establishment or cell parameter variation; and the network device sending a second system message repeatedly according to a set period and a threshold of the number of retransmissions, the first system message and the second system message comprising the same cell information. The present invention can effectively accelerate the update frequency of a system message, guarantee the update synchronization of a system message of a UE and a system message of a network side to the greatest extent, and avoid the problem that the UE cannot access a WCDMA system due to the turnover of the existing value tag.