The invention discloses a door-control monitoring system. The door-control monitoring system disclosed by the invention has the advantages that signal lines do not need to be rearranged for a doorbell, rewiring for mains supply is avoided by a voltage converter, remote monitoring is realized by an internet, the problem that the doorbell system needs to be rewired for the door-control system so as to realize data communication in the prior art is solved, and the problem that the door-control system in the prior art can not realize remote transmission of monitoring signals is also solved.