The geodetic coordinates(L

B ) of Urumchi VLBI station was calculated with the method of Gauss coordinate translated according to the coordinates (x

y) of Urumchi VLBI station of Beijing coordinate system

1954 ; then

the values of astronomical coordinates (λ ) was obtained by related formulae ; the position of the Polaris at elongation was calculated by the coordinates ;the direction of the north Pole was found out according to the position ;finaly the orientational problem of according to the position if maly the orientational problem of the large astronomical observing equipment (the null point position of the azimuth about the radio telescope) was solved.The coordinates which we calculated was used in the installation and modulation of the 25m radio telescope

and the international joint observations. Recently

the coordinates was compared with which obtained by GPS

The results are satisfactory.