A detection device for a condenser reflecting surface of a solar heat power generation system comprises: a horizontal rotary beam disposed above the condenser reflecting surface and capable of rotating in a horizontal surface, a plurality of laser heads being disposed at the bottom end of the horizontal rotary beam, a receiving disk perpendicular to the central axis of the horizontal rotary beam and capable of vertical movement connected at the theoretical focus of the condenser reflecting surface below the horizontal rotary beam, a camera being disposed below the receiving disk. A solar heat power generation system comprises the condenser reflecting surface and the detection device, and the detection device is disposed right above the condenser reflecting surface.