This system by tps334 infrared temperature sensor, high accuracy amplifier，A/D switch AD7705, AT89C51 microcomputer master control part constitution ,decoding demonstration module and warning circuit . Realized the non-contact type infrared clinical thermometer．It can be accurate in shorter time to measure a temperature of human body, but at measure the temperature outrun some one scope be in use to report to the police electric circuit to carry on a super mark to report to the police namely. In the article discussed the infrared non- contact type clinical thermometer basic principle, proposed the concrete design proposal, and has carried on the feasible proof. And we have produced the circuit diagram and the program flow diagram and attach the source program. Follow-on trend of abroad digitize was at present complied with in the design of this system, and the exploit singly merit of piece machine and numerical control system makes the each side function of system get the notable raise.
