The present invention belongs to the field of communication technology. It puts forward a CATVa safety system formed from safety monitoring facilities, household and interface, distribution network, front end interface CATV safety main machine and cable television safety-subscriber household signal management system, and adopts two communication modes of polling and interruption to make said safety monitoring facilities detect the signals of first-aid, etc of household end, then utilizes the distribution network of cable television to transfer the signal into front end interface to contact with safety service centre to minimize damage. Besides, said invention also can raise utilization rate of CATV (cable television) network, and can effectively raise real-time maintenance capability of network and raise service quality.