According to the concept of JADO, the paper defines Joint Actions Control (JAC): the implementation of “cross-domain synergy” in the OODA cycle, and the object, level and goal of JAC, the method and the effectiveness of JAC are analyzed. The purpose of the paper is to interpret the internal mechanism of JAC in JADO, and to apply the dynamic reconstruction of killing chain/net and the cooperative theory of operational elements to the JADC2