A multifunctional, modular, and scalable digital radar electromagnetic environment simulation application system based on a local area network is designed and proposed to address the issues of high cost, long term, and difficulty in constructing a real radar electromagnetic environment. It can realistically simulate the electromagnetic environment faced by radar, reduce evaluation and verification costs, improve efficiency, and also have high security. By leveraging the VC development platform and adopting a client/server architecture pattern, distributed application processing of client program requests is achieved. Based on this system structure, computer processing power can be fully utilized, with fast response speed and low network communication volume, ensuring system flexibility while also reducing the demand for hardware resources.