To solve the integrated scheduling problem of imaging reconnaissance satellites under emergent conditions, based on analyzing the process of mission responding, an integrated scheduling model for mission requirements is proposed. The earliest mission complete time is considered as the model’s optimization objective, and the assignment of satellites, control resources, data receive resources are also considered. An algorithm based on depth first search is proposed. Finally, by analyzing computational examples, the results show that the proposed model and algorithm are valid, and the scheduling result can provide integrated scheduling solutions for emergent mission requirements under existing conditions which include satellites, control resources and data receive resources.