Engineering control network coordinate determination method and system

The invention discloses an engineering control network coordinate determination method and system, and the method comprises the steps: obtaining the relative position data of all control points on an engineering control network, and taking the control points at the two ends of the engineering control network and any control point between the control points at the two ends as known points; acquiring a numerical value of a known point in a national geodetic coordinate system; and according to the numerical value of the known point in the national geodetic coordinate system and the relative position data between the control network points, determining the numerical values of other control points of the engineering control network in a preset coordinate system. According to the method, the numerical values of the two end points of the control network and any control point between the control points at the two ends under the national geodetic coordinate system are directly obtained to serve as the starting point o