The invention relates to an
azimuth-elevation tracking method of a
heliostat with a reflecting mirror surface deviated from a rotating center, which comprises the following steps: firstly calculating the accurate normal of the mirror surface center of the
heliostat, and then calculating the tracking
azimuth angle and the tracking
elevation angle of the
heliostat under the condition that an elevation rotating shaft is parallel to the tangent plane of the mirror surface center; measuring unit target vectors, measuring the inclination angles psit and psia of the
azimuth rotating shaft of the heliostat, measuring the non-orthogonal
deflection angle tau1 of the two rotating shafts, calculating a certain moment of a unit sun position vector at any moment at
daytime of a local place, rotating the heliostat to enable the reflected solar faculae to be just positioned at the center of a focusing
target surface, i.e. the center of the faculae is aligned with the center of the focusing
target surface, and determining the tracking azimuth angle and the tracking
elevation angle corresponding to an initial reference position of the heliostat rotating along the shaft by comparing the current tracking azimuth angle and the tracking
elevation angle with the respectively rotated angles of the heliostat from the initial reference position to a current position recorded by an azimuth rotation
encoder and an elevation rotation
encoder.