A monitoring system for brake disks, particularly of rail vehicles, having at least two sensors which are arranged in the brake disk or in the proximity of the brake disk and whose sensor signals relate to the temperature of the brake disk. The monitoring system includes at least one transmitter which transmits the sensor signals, and at least one receiver which receives the transmitted sensor signals in a wireless manner. Furthermore, the invention relates to a method of monitoring the temperature of brake disks. The method includes measuring the temperature of at least one brake disk, converting sensor signals to processible values; transmitting the values or the sensor signals to a receiver in one or more of an encoded manner and successively in a timed manner; and processing the received values or sensor signals in one or more of the control unit and the regulating unit.