The present invention relates to a geodetic surveying system, and more particularly, to a base structure, a fixed housing, a pair of rainwater guide pipes, a leveling part, a pole housing, a datum pole, a datum rotation part, a liquid tank, an absolute position sensor, a horizontal sensor, Characterized in that it includes a light receiving element, a control unit, a national reference point, a geodetic survey device, a national reference point management server, and a worker terminal, even if the subsidence of the ground proceeds so that the basic structure of the national reference point is in a tilted state, the reference point table of the national reference point The State relates to a geodetic surveying system that significantly improves the precision of surveying work using a national reference point that can always maintain a horizontal state.
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