To gather environmental information of a transported article with higher precision using results of sensing by other sensor nodes existing nearby.
Each sensor node 1 comprises a measuring means 11 to measure environmental information of the transported article at the own sensor node, a correcting operation means 12 to transmit measured environmental information to other sensor nodes 1, receive environmental information from other sensor nodes 1, and determine the environmental information of the own sensor node based on the environmental information received from other sensor nodes 1, and a transmitting means 14 to transmit the environmental information of the own sensor node 1 determined by the correcting operation means 12 to a server 3. The server 3 comprises an environmental information storage means 32 to store the environmental information, a receiving means 2 to receive determined environmental information from each sensor node, and a writing means to write the received environmental information to an environmental information storage means.
SAKURAI ATSUSHI
FURUYASU SHIZUO
BAN KOJI
