An energy-saving management method for a wireless sensor network, comprising: the wireless sensor network sending remaining energy information of a node, and/or network topology information, and/or node hibernation information to a remote management server through a gateway device; the remote management server storing the remaining energy information of the node, and/or the network topology information, and/or the node hibernation information, making an energy-saving decision according to the remaining energy information of the node, and/or the network topology information, and/or the node hibernation information which are stored, and sending the energy-saving decision to the wireless sensor network through the gateway device, wherein the energy-saving decision of the remote management server comprises: control for network topology, and control for hibernation and wakeup of the node, specifically: in the control for the network topology, the remote management server determining a type of the wireless sensor network according to the network topology information that is stored, and replacing, according to an energy balance rule, a routing node or a cluster head node at regular intervals or each time when certain energy is consumed; and in the control for the hibernation and wakeup of the node, the remote management server judging whether the node supports hibernation according to the node hibernation information, and sending a hibernation configuration command to the node when the node supports the hibernation and is not in a hibernation mode, and the node configuring hibernation time for the node according to a situation of a data uploading task, entering a hibernation state after the data uploading task is completed, and automatically waking up when the hibernation time is up; and the wireless sensor network making a response according to the energy-saving decision of the remote management server. the wireless sensor network sending remaining energy information of a node, and/or network topology information, and/or node hibernation information to a remote management server through a gateway device; the remote management server storing the remaining energy information of the node, and/or the network topology information, and/or the node hibernation information, making an energy-saving decision according to the remaining energy information of the node, and/or the network topology information, and/or the node hibernation information which are stored, and sending the energy-saving decision to the wireless sensor network through the gateway device, wherein the energy-saving decision of the remote management server comprises: control for network topology, and control for hibernation and wakeup of the node, specifically: in the control for the network topology, the remote management server determining a type of the wireless sensor network according to the network topology information that is stored, and replacing, according to an energy balance rule, a routing node or a cluster head node at regular intervals or each time when certain energy is consumed; and in the control for the hibernation and wakeup of the node, the remote management server judging whether the node supports hibernation according to the node hibernation information, and sending a hibernation configuration command to the node when the node supports the hibernation and is not in a hibernation mode, and the node configuring hibernation time for the node according to a situation of a data uploading task, entering a hibernation state after the data uploading task is completed, and automatically waking up when the hibernation time is up; and the wireless sensor network making a response according to the energy-saving decision of the remote management server. in the control for the network topology, the remote management server determining a type of the wireless sensor network according to the network topology information that is stored, and replacing, according to an energy balance rule, a routing node or a cluster head node at regular intervals or each time when certain energy is consumed; and in the control for the hibernation and wakeup of the node, the remote management server judging whether the node supports hibernation according to the node hibernation information, and sending a hibernation configuration command to the node when the node supports the hibernation and is not in a hibernation mode, and the node configuring hibernation time for the node according to a situation of a data uploading task, entering a hibernation state after the data uploading task is completed, and automatically waking up when the hibernation time is up; and the wireless sensor network making a response according to the energy-saving decision of the remote management server.