Active electronic tags as well as system and method applying active electronic tags

The invention provides multifunctional active electronic tags as well as a system and method applying the active electronic tags in order to solve the problem of achieving low power consumption, bidirectional communication, working on demand and remote information transmission of the active electronic tags. The system comprises a control processor, a coordinator, the active electronic tags and a reader, wherein the active electronic tags are used for receiving command signals in the time period (namely the moment of monitoring the signals after waking from periodic sleep) of monitoring the states; the active electronic tags comprise soft filtering modules and hard filtering modules; the soft filtering modules are used for judging whether the address codes of the signals received by the active electronic tags in a first channel are correct; and the hard filtering modules are used for filtering the signals at the hardware side before the signals are subjected to soft filtering so as to get rid of the invalid si