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Geostationary satellite ocean imaging radiometer is a passive remote sensor that measures the radiation characteristics of marine targets. In order to achieve full coverage of the detection area by the stationary satellite detector, the system computer processor needs to drive and control the precision mechanical turntable to drive the optical pointing mirror to operate regularly. This article uses Visual C ++ development tools to design an imaging radiometer pointing mirror control software, and drives the pointing mirror through serial port communication, so that the marine imaging radiometer relies on the two-dimensional pointing mirror to do east-west and north-south motion pointing to adjust the coverage area. In the design, the library function of PI company's six-axis turntable was called, and the multi-threading technology was used to control the directional scanning mode and motion speed of the PI-based turntable. Through the software's incremental design and testing, combined with the external field test of the machine's continuous acquisition of the water body spectrum at the offshore tower, it is verified that the software design achieves the goal of precise control of the ocean radiometer pointing mirror, which effectively improves the ground optical testing and data processing efficiency.