Abstract: Considering the rapid development and wide popularization of space and information technology,the question what kinds of concept and techniques should be updated or introduced in the modern geodetic coordinate system is discussed in this paper.The following six elements are suggested to be the marks of a modern geodetic coordinate system in China,i.e.precision,cover whole Chinese territory,three dimensions,geocentric,kinematics,integrate with the international conventional reference system.It is necessary to densify GPS stations and GPS continuous operation stations in the GPS2000 network in order to have enough distributed density of Chinese geodetic coordinate frame.The Chinese modern geodetic coordinate system should provide a reliable,suitable geographical spatial fundamental reference frame for the coordinate determination in any time,at any place of China.