Electro-optic system equipment is usually composed of multiple components, so the deployment of software for each component and loading and upgrading of program have become a key technology. Due to the many shortcomings of traditional loading methods in terms of loading methods and loading efficiency, it is crucial to develop an efficient and convenient remote loading technology. In response to the above issues, this article designs and develops a remote loading technology, and successfully applies this technology to infrared electro-optic systems. The remote loading function is mainly implemented through the computer and remote loading board. The computer is responsible for remotely sending the upgrade file to the loading board. After successfully receiving the data, the loading board completes the program upgrade of the loaded components. To increase the reliability of the loading function, a backup boot function is designed to enable secondary loading of the program in case of loading failure.