This graduation thesis describes the procedures for determination coordinates of control points, stabilized on the measuring section, and 3-D displacements of tunnel pipe. In the preliminary phase, a geodetic instrument was tested with field procedures for testing the geodetic instruments ISO 17123 to determinate its practical accuracy. A suitable practical accuracy is required for the optimal accuracy of geodetic monitoring. The graduation thesis presents methods of displacements determination with accuracy evaluation generally and practical example of geodetic monitoring in tunnel Šentvid. More over the instrumentary used, point stabilization and procedure for displacements determination of control points of measuring section are described. The displacements standard deviations are estimated and statistical testing of characteristic point displacements of measuring section are made.