Abstract: A digital type wireless monitoring system includes transmitters having cameras associated therewith; and a receiver displaying image signals on a screen, the image signals being captured with the cameras at the transmitters and received wirelessly while being installed within a specified distance from the transmitters. Each transmitter performs an MPEG-4 encoding, which compresses only the image signals while excluding audio signals; and creates a file by combining a header containing information of each transmitter and communication standard with each of the image signals for each frame. Further, the receiver having a permanent IP address receives the files received by an AP; receives the files containing header information via the AP; streaming replays images of many channels simultaneously or images of a single channel by using a streaming viewer; stores the image signals of each transmitter being streaming replayed to a designated storage space under the control of a supervisor.