The primary aim of this paper is a design based on carrier communication UWB Technology ( UWB ), and the fireman's position for the design of positioning system, which overcomes the traditional shortcomings of positioning system, and improves the fire location accuracy more, and can play a good role in indoor. UWB positioning technology has the advantages of low power consumption, high speed,multipath effect, high safety, and especially it can provide very high precision in positioning and has great development potential in radio positioning technology.