The article discusses the rapid development of Service-Oriented Architecture (SOA) in the context of Web services technology. It highlights the lack of a widely accepted SOA reference model and solution. The authors delve into the definition, basic technology, and main characteristics of SOA, analyzing a reference model by the OASIS organization. They propose a solution that integrates non-SOA systems with SOA using Web services as a foundation. This solution has proven to be practical and effective. The article also identifies key areas for further research in SOA, such as establishing a recognized reference model, a uniform standard, and a security mechanism.