Wireless short-distance group discriminating inductor and matched information exchanging system on Internet

The sensing machine comprises a computing control module, a memory module, a keyboard, a temperature sensor, a wireless transceiver, an USB bus interface and a display module. The network supporting message exchanging system comprises the client side and the server side. Each sensing machine has a unique serial number and an authorized cipher; the hosts of sensing machines are distinguished each other by the serial numbers; using a digital code to distinguish different usage; only the sensing machines using same digital code (same type) can sense, receive and save the materials of their opposite machine. The sensing machines in same type can automatically make sensing interaction each other when they meet.