A sun tracking device comprises a heat collector (6), a photoelectric induction device (2) installed on the heat collector (6), and a tracking driving device (5) used for driving the heat collector (6) to track the sun. The sun tracking device further comprises an information device (3) used for providing a position and a clock, and a control device (4) used for controlling the tracking driving device (5). The control device (4) is in communication with a meteorological station (1), the photoelectric induction device (2) and the information device (3) and receives the weather information of the meteorological station (1), the light intensity information of the photoelectric induction device (2) and the time and clock information of the information device (3). The sun tracking device is convenient to install as installation adjustment is reduced, the requirement for precision in manufacturing and machining is lowered, and installation cost is reduced. For all slot type heat collecting fields adopting astronomy tracking, the practical spatial position of a rotating shaft can be regularly detected, the tracking turn angle can be regulated, and tracking with higher precision can be achieved.