The SAR payload system of remote satellite has the characteristics of multi-polarization, multiple operating modes, high resolution, wide bandwidth, large antenna size, high power consumption, high radiation resolution, and long imaging time. In order to provide a good thermal environment during the operation of the satellite SAR payload antenna in orbit and ensure that the temperature consistency between the participating imaging modules during the operation of the SAR payload antenna meets the requirements, the satellite must adopt an intelligent autonomous temperature management design strategy to control the heating loop of the SAR payload antenna and effectively reduce the temperature difference between the entire array components. This article first describes the information flow architecture design of the autonomous temperature management system for remote satellite; Secondly, a detailed explanation was provided on the design of autonomous temperature control. Finally, practical verification of the intelligent autonomous temperature control system was carried out during the thermal test verification and in orbit operation stage. After verification, the information flow design of autonomous temperature management for satellite SAR payload fully meets the usage needs of SAR antenna during satellite in orbit flight, and meets the long-term imaging needs of satellite users to the ground.