Zhang Shuai and Wu Honglin wrote in this article: 'If you calculate more, you won't be able to calculate less, let alone have no calculation.'. 'Calculation' is an essential command skill for an excellent commander. By observing the overall situation, meticulously planning, tracking changes, and scientifically applying the timing and methods of "calculation", we can constantly think in front of the enemy, plan in front of the enemy, and move in front of the enemy in order to adapt to the complex changes in modern battlefield situations and cause harm to people without harm to them. Calculate the overall situation. Military affairs are subordinate to politics, and strategy is subordinate to political strategy. Any combat action has multiple dimensions of effects such as politics, economy, and diplomacy. We cannot simply calculate combat issues from a military perspective, but should comprehensively consider the overall perspectives of politics, economy, diplomacy, humanities, and society. Comrade Mao Zedong's precise judgment of the stages, duration, and outcome of the Anti Japanese War and Liberation War is a forward-looking analysis based on various factors such as national strength, military strength, and international situation. The overall calculation requires a combination of quantitative and qualitative analysis from multiple perspectives to comprehensively grasp and plan the overall situation in strategic foresight. Research and calculation system. War is a complex giant system, and after planning operations from a specific background and global perspective, it is necessary to use system thinking to study and calculate the nodes and critical targets of the enemy or our system. Especially in modern combat systems with a network chain structure, searching for nodes can often achieve the effect of "sealing the throat with one sword". Commanders and command organs analyze the strength of the connections between various nodes, and then use Analytic Hierarchy Process and Structural Analysis to identify key nodes, important hubs, and critical targets that support the enemy's combat system, focusing on platform equipment, deployment positions, electromagnetic situation, and flow changes, in order to understand the bottom line of the enemy's operations. Budget situation. After using a global perspective and systematic thinking to plan and judge operations, it is necessary to rely on the operational concepts, theoretical guidance, and weapon equipment application of both the enemy and ourselves, and rely on big data, cloud computing, and other means to predict the operational situation in advance, in order to optimize the deployment of our own forces and start a strong start. Before the war, commanders and command organs need to rely on various situational awareness systems to comprehensively grasp the battlefield situation, accurately grasp, focus on the overall situation, and scientifically foresee, especially paying attention to the new concept weapon platforms such as the enemy's new domain and new quality. They should adjust according to the enemy's military deployment, predict the enemy's key attack direction and target, budget for future combat development, and be prepared and actively respond. Joint computing deployment. Operational deployment is the planned preparation of operations after budgeting the battlefield situation, and is the material condition that supports operations. In modern warfare, there is no battle without alliance, and no alliance is invincible. The planning of combat deployment also needs to be based on the perspective of "alliance". Based on the number of troops and weapons on both sides of the battle, the effectiveness of weapons and equipment, the combat capability of the joint forces, as well as the effectiveness of combat operations, combat consumption, and possible costs, the calculation conditions and content are determined based on specific combat tasks and ultimate combat objectives. Quantitative analysis methods such as Delphi method, combat power index analysis method, and statistical method are used to calculate the required number of different types of military forces and weapons, Scientifically and reasonably determine operational deployment. Actuarial actions. Operational action is a specific implementation plan for the operational plan, which decomposes the operational determination through precise calculation and achieves the optimal solution in linear and dynamic planning