Abstract: The downlink data channels for a certain type of satellite include: satellite telemetry channel data and digital transmission channel data. The telemetry channel data refers to the S-band telemetry channel downlink data, and the digital transmission channel data refers to the digital transmission data engineering parameters. Based on the characteristics of digital transmission channel data with high rate, dual channels, and multiple application modes, a satellite status quantity processing and monitoring system is designed to meet the requirements of frame processing, analysis, and display of multi-channel data and high-rate digital transmission data engineering parameters, query, storage and abnormal alarm functions. This software system has been successfully applied to the mission operation control system of a certain type of satellite to meet the real-time monitoring of the satellite type platform and load.