Wireless network-based positioning method and positioning device

The present invention provides a wireless network-based positioning method and positioning device. The positioning method comprises: obtaining the time information for determining a current location of a node to be positioned, said time information recording the times at which a first detection signal, sent by the node to be positioned at the current location thereof, arrives at at least three anchor nodes; determining the time differences between the first detection signal arriving at the at least three anchor nodes according to recorded history information and the time information; determining the current location of the node to be positioned according to the locations of the at least three anchor nodes and the time differences between the first detection signal arriving at the at least three anchor nodes. The present invention is able to accurately determine the time differences when a detection signal arrives at different anchor nodes, thereby determining the accurate location of the node to be positioned and avoiding synchronization among different anchor nodes.