The utility model provides a rack environment detection system comprising a wireless sensor arranged in the rack and used for detecting the rack environment, a wireless transmission base station in wireless connection with the wireless sensor, and a host computer in wireless connection with the wireless transmission base station. The novel wireless sensor needs only to be arranged in the rack, no wiring in a conventional rack is needed, so wiring error can be prevented, thus preventing server fault caused by wrong wiring; the wireless sensor is simple in mounting, and mounting efficiency of the sensor can be improved.