The invention provides a system and a method for recognizing and monitoring exercising action through an unbound radio frequency label. The system comprises a plurality of commercial passive RFID label, an antenna, a Reader, a CPU and a prompting unit; the CPU comprises a data processing unit and a data storing unit; the detected people or matter within the communication range of the label and the reader can be recognized without modifying any existing commercial device or extra hardware facilities; the method is simple to use, quick and effective, can monitor and supervise the exercising action of a user on real time and guide the user. With the adoption of the method, the action standardability can be recognized, and the exercising action of a human body can be recorded and monitored on real time; the standard action data of the user are acquired firstly; the feature wave configuration files are extracted through a plurality of filters and by the extraction algorithm; then the configuration files can be matched on real time through the DTW algorithm to recognize the user action when the user exercises; the test performed in an indoor and closed office building, the recognizing precision of the exercising action is up to 92%.