Abstract: The function verification of C2 system of land force is a way to check its satisfaction level to real fighting in the system application. The verification is caught out after the force has received these equipment. In order to complete the verification, the environment with virtual force and real software was built by modeling and simulation method, so that the verification could be carried out under the condition which is similar to true combat. In this environment, the interaction between real human and virtual force by the C2 software could help to complete the verification. Focusing on the credibility in the verification process and its result, the conception and composition of credibility of C2 system function verification were expounded, analyzing its influence factors. Then, the relative control method was given to each factor. It could support the formation of fighting capacity based on information system effectively.

Key words: land force, C4ISR, simulation training environment, formation of fighting ability