The invention relates to a system for using wireless terminal to detect the family condition, wherein the system uses image collector to collect the image signal of family condition, to transmit it to the image processor; the image processor compresses/decompresses the image signal to transmit it to the digit signal processing unit; the digit signal processing unit, controlled by the central processor, codes the image signal, and transmits it to the wireless terminal via wireless sender/receiver. The invention also provides a relative method. The invention adds camera and voice recorder in the network family appliances, to real-time or tied collect the video and voice signals to transmit them to the user.