Method for transmitting sensor data in the sensor network including pair node

A method for transmitting sensing information in a wireless sensor network having a pair of nodes is provided to determine the fault of a sensor node and a pair node using only sensing information collected by the sensor node and the pair node, which are installed in the same target area to sense information, thereby having no need of additional cost to be economical and efficient. A method for transmitting sensing information in a wireless sensor network comprises the following steps of: setting sensor nodes(301,302) installed in the same target area into a pair of nodes which transceive sensing information each other; allowing one of the sensor nodes set as the pair of nodes to transmit first sensing information(c1), which the sensor nodes sense, to the other sensor node in the pair of nodes; allowing the sensor nodes set as the pair of nodes to transmit the first sensing information and second sensing information(c2) received from the other sensor node in the pair of nodes to a parent node(306); and allowing the parent node to transmit the first and second sensing information to a sink node(308).