The present invention relates to a WiFi network system. More specifically, a digital network & control unit (DNCU) which is a digital network controller in one WiFi access point (AP) and a WiFi radio unit (wRU) which is a radio signal transmitter are separated from each other, and common DNCUs in each WiFi AP are placed in an operating station. Thus, the common DNCUs are concentrated on one place and managed. In addition, since only the wRU is placed in outdoor and indoor WiFi service areas in which radio signals are actually transceived, the product price and the network investment cost and management cost can be reduced. To this end, a digital networking & control unit (DNCU) which includes a digital controller and a network processing unit and a WiFi radio service unit (wRSU) which includes a WiFi radio and an antenna unit are independently separated from each other and are connected to each other by a cable.