Solar photovoltatics tracking system and the principal

A solar tracking device utilizing a CDS(carmium sulfide cell) device is provided to move a solar part according to sunlight by supplying current to a motor in case the CDS device receives sunlight. A solar tracking device utilizing a CDS(carmium sulfide cell) device comprises: a tracking sensor(1) in which a plurality of CDS devices tracing sunlight are built in; a solar unit(5) in which the tracking sensor and a plurality of solar panels(52) are built in a frame(51); an east-to-west drive unit(2) controlling the solar part in a east-to-west direction; a south-to-north drive unit(3) controlling the solar part in a south-to-north direction; and a housing(4) in which a rotating disc(232) supporting the south-to-north drive unit and a solar part is constructed.