Logistics System

A logistics system comprising:

• a first information reading and transmitting device that reads an information code attached on a product and transmits data contained in the information code;
• a second information reading and transmitting device that is operated by a carrier who receives the product from a manufacturer to read the information code attached on the product and transmit data contained in the information code upon the product receipt and before and after the product delivery;
• a third information reading and transmitting device that is operated by a customer who receives the product from the carrier to read the information code attached on the product and transmit data contained in the information code upon the product receipt;
• a server that accumulates data transmitted from the first, second, and third information reading and transmitting devices over a communication network;
• and
• a terminal device that refers to the accumulated data from the server over the communication network,
• wherein the information code includes a pattern that will convert when its temperature has deviated from a specified temperature and the logistics system uses the information code.