A system architecture for assistant operation decision-making system of command and control system is designed based on the idea of Service-Oriented Architecture (SOA).Then the key technologies for the service-oriented,assistant operation decision-making are analyzed,including five aspects as the serviced description of assistant operation decision making course,service running management,assistant operation calculation modeling,cooperative operation mission planning and real-time surveillance of combat process.This purpose is to supply a technical reference for developing a command and control system with aided intelligent decision-making in the future.