According to the distribution regularity of the electric fields of surface single spot current source and the basic thought of the high density resistivity prospecting method,and from the principles of the pole-pole electrical prospecting and the seismic prospecting,this paper puts forward a network electrical prospecting system, which uses one current electrode to perform power supply, with the other electrodes conducting synchronous prospecting. The synchronous rapid measurements such as Wenner pole-dipole,Wenner pole-dipole and pole-pole array of the high density resistivity method can be realized by indoor data-processing. This technology can enormously cut down the working hours of data collection in open field and greatly improve the efficiency of the electrical prospecting. It has been applied in many engineering projects,such as foundation prospecting,the measuring of the height of the water flowing fractured zone in working faces,the detection of the water source of coal well water bursting.