| The high-speed development and wide application of information technology has brought revolutionary progress to and influenced human beings. As the result, the emerged computer & server room arouses serious daily maintenance. The fire fighting is one of them to the computer & server room. According to the design regulation for computer room issued by the national authorities of CHINA, Auto-alarm system should be provided in the computer room. The aim of this paper is to design one auto-alarm system based on the temperature supervision.By means of combining theory discussion and practical development, the author studied the 1 -wire bus technology developed by the Dallas Semiconductor company in USA and communication protocols and deeply explored the heat transferring problems when the temperature sensor is applied. At the same time, the author realized the temperature supervision as one part of the auto-alarm system based on DALLAS 1-wire bus technology and MCU. Also, the author engineered and designed one on-line and cheap temperature supervision system.
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