Abstract: Along with the development of reference station technology oi GF5 and Uomputer tecnnology anu network technology, the Network RTK is developed and applicated quickly. It explains the construction of continuously operating GPS reference station and the principle of Network RTK operation, also explains the importance of quality control, affect the Network RTK operation factor, methods of quality control and so on. Through appropriate equipment of Network RTK and opera tional mode. using all methods of quality control, can obtain stable, reliable,real-time and precise result.