在对Ｃ~３Ｉ系统综合评论的基础上，提出了Ｃ~３Ｉ系统发展中的几个理论难题。即：系统一般理论问题；数据融合理论与算法；指挥决策理论问题；管理职能问题；火控理论新问题；智能Ｃ~３Ｉ问题 Based on the comprehensive review of C ~ 3I system, several theoretical problems in the development of C ~ 3I system are proposed. Namely: the system general theory question; the data fusion theory and the algorithm; the command decision theory question; the management function question; the fire control theory new question; the intelligent C ~ 3I question