Even if a user of this system uses his/her PC at any place distant from a site to be recorded, this system enables the user to record & replay, on his/her PC, any image with sound which can be taken through its network camera connected with LAN or the Internet. Under this system, the user can record any image as well as sound with it, & so the user can feel as if he/she was on the spot, even though he/she is actually away from the site. Also, this system enables the user to record several pieces of images through its network cameras at the same time. Corresponding to the existing convenient functions of MPEG-4 & Motion JPEG, this system has also corresponded to the H.264 function which is responsible for high-compression & smooth moving image. So, users of this system can select a proper recording mode among multiple choices according to recording uses & environments. This system enables a user to record & monitor, innovatively clearly in such high resolution as 1280 x 960 pixels, any image taken through its camera. If you need to take a clear & detailed image for your convenient use by this system, you can save in your PC your recorded data as high image quality as it is for your convenience. This system enables a user to display images from up to 16 network cameras on one screen for simultaneous monitoring. In case that the number of network cameras registered in BB-HNP17 exceeds 16 units, this system can show images from up to 64 network cameras on 128 pages of screens & switch these screens flexibly according to the users need. Under this system, for example, a user can switch images from its cameras into a whole image screen or switch into a single screen display by double-clicking an image the user want to check closely, etc.