Abstract: This invention is related to an early warning system for car tires' temperature and pressure, wherein a processor for alarm receiving mounted in said early warning system is mainly connected to a car's rear-view mirror, wherein said alarm information may be acknowledged by the driver through said glass mirror surface, wherein alarm detection information of a plurality of detecting functions, such as pressure detecting, temperature detecting, weak current detecting, may be simply and easily coupled to each tire rim of said car for basis of variations detected, and wherein data as information timely collected are sent to the processor for alarm receiving by way of wireless transmission in order to compare, and then after comparison may be shown on the rear-view mirror for the driver to see instantly when an alarm condition happens, and may function as alarm information, for achievement of the preferable invention with skilful design and availability.