The invention discloses a method,a device and a network system for network link management. The method includes that get the link access information of a target link, wherein, the link access information is used for indicating if a target node can transmit data in the target link; get the state of the network that the target link belongs to, wherein, the network state is used for indicating if the transmission power of each link in the network is less than the alarm transmission power; adjust the transmission power of the target node in the target link according to the link access information and the state of the network that the target link belongs to. The proposal provided by the embodiment of the invention can help optimize the number of the accessed links on premise of ensuring the present signal to interference plus noise ratio (SINR) of each link to be not less than the preset least signal to interference plus noise ratio (SINR).