A method for determining a node movement in an Internet Protocol Version 6, IPv6, wireless sensor network, comprising: when a first node determines that the first node is currently in an abnormal state, broadcasting at least two received signal strength indication, RSSI, request messages, wherein that a first node determines that the first node is currently in an abnormal state comprises: when it is detected that a current Rank value changes, the first node determines that the first node is currently in the abnormal state; or when it is detected that a parent node set of the first node changes, the first node determines that the first node is currently in the abnormal state; or when it is detected that a preferred parent node of the first node changes, the first node determines that the first node is currently in the abnormal state;receiving, by the first node, signal strength measurement values that are returned by a second node and separately obtained by means of measurement for at least two RSSI request messages in the at least two RSSI request messages broadcast by the first node; separately calculating at least two path loss values between the first node and the second node according to the at least two received signal strength measurement values; and determining, by the first node, that the first node moves when it is determined that a quantity of second nodes, of which at least two path loss values are all different, is greater than a set threshold. when a first node determines that the first node is currently in an abnormal state, broadcasting at least two received signal strength indication, RSSI, request messages, wherein that a first node determines that the first node is currently in an abnormal state comprises: when it is detected that a current Rank value changes, the first node determines that the first node is currently in the abnormal state; or when it is detected that a parent node set of the first node changes, the first node determines that the first node is currently in the abnormal state; or when it is detected that a preferred parent node of the first node changes, the first node determines that the first node is currently in the abnormal state;receiving, by the first node, signal strength measurement values that are returned by a second node and separately obtained by means of measurement for at least two RSSI request messages in the at least two RSSI request messages broadcast by the first node; separately calculating at least two path loss values between the first node and the second node according to the at least two received signal strength measurement values; and determining, by the first node, that the first node moves when it is determined that a quantity of second nodes, of which at least two path loss values are all different, is greater than a set threshold. when it is detected that a current Rank value changes, the first node determines that the first node is currently in the abnormal state; or when it is detected that a parent node set of the first node changes, the first node determines that the first node is currently in the abnormal state; or when it is detected that a preferred parent node of the first node changes, the first node determines that the first node is currently in the abnormal state;receiving, by the first node, signal strength measurement values that are returned by a second node and separately obtained by means of measurement for at least two RSSI request messages in the at least two RSSI request messages broadcast by the first node; separately calculating at least two path loss values between the first node and the second node according to the at least two received signal strength measurement values; and determining, by the first node, that the first node moves when it is determined that a quantity of second nodes, of which at least two path loss values are all different, is greater than a set threshold.