Abstract: Aiming at the disadvantages of the simple mathematical framework and ignoring the dynamic interaction among the combat units,opponents and environment in Lanchester equation two models effectively reflecting the force attrition are proposed based on the analysis of physical meaning and combat process of the Lanchester linear law.The force attrition process is particularly reflected by the Lanchester linear law using a force loss exchange ratio.The effect of asymmetry information of combatants on the outcome is also discussed by introducing a game theory.The surveillance and reconnaissance functional model of the C4ISR system is proposed by simulation results using given scenarios.