Abstract: Service composition method is of great importance for military information system based on SOA in the distributed environment, the paper proposed a service dynamic composition method. Firstly the paper defined command and control capability package service description and composition model based on object Petri-net, analysed and proved service composition's arithmetic operators, then brought forward service dynamic composition flow chart, finally made use of object Petri-net modeling and simulation environment of national university of defense technology to simulate service composition model the paper has brought forward, and in the end analysed the experimental datum.

Key words: Object petri net, C2 capability package, Service dynamic composition