The invention provides a method for controlling data recovery, a node, a control device and a disaster-recovery system. The control method comprises the steps of: in a process of recovering data, collecting performance indexes of data transmission among regions by the control device; judging congestion level of a network among the regions by the control device according to the performance indexes; and when the congestion level exceeds the preset congestion control threshold, reducing the number of nodes of network recovery data among the regions in the first region by the control device. The invention can reasonably utilize network bandwidth among the regions in a data recovery process, and can avoid that the data transmission efficiency is deteriorated due to network congestion, thereby reducing time required in the disaster-recovery time.