In the distributed system environment, it has become an urgent problem to be solved in the effective management and processing of remote sensing big data in scientific research and application fields. Distributed computing provides an ideal solution, which processes and manages large-scale data sets through the joint work among decentralized computing resources. This paper studies the design of a distributed management system for remote sensing big data based on computer technology, introduces the core concepts and design principles of distributed computing, and analyzes the characteristics of remote sensing big data, including huge data volume, fast update speed and type diversity. Finally, a remote sensing big data distributed management system is designed in detail, including data collection module and data processing module, and the effectiveness and practicality of the system are verified by technical tests.