Abstract: According to the realistic requirement of telecom operators, the basic architecture of BSS/OSS was given out. The architecture consisted of three management domains:customer management domain, service management domain and network/resource management. The service cell components of each domain were defined to modify the architecture. Using the concept of abstract components set, the service-handling chart of BSS/OSS was released based on the characteristics of telecom operators service. The information model of BSS/OSS was designed in final.