In view of the system flexibility and scalability problems in the traditional IT system architecture, SOA is proposed as the solution. On the basis of introducing the basic concept of SOA and service bus, an image transmission method based on the service bus is proposed with the application of image transmission, which mainly discusses the bus architecture, the sending service component and the processing flow, and the processing flow of the image receiver. This method can make the function update more conveniently on the basis of satisfying the image transmission function, thus improving the flexibility and expansibility of the system.