The problem of disaster monitoring satellite (imaging satellite) scheduling based on CHARTER mechanism is researched. At the very beginning the mechanism on which CHARTER is working was introduced. The problem was taken as a rescheduling problem against area targets according to the mechanism. To observe effectively, a dynamic partitioning algorithm for area target was proposed, and a dynamic rescheduling algorithm was raised to support satellite re- rescheduling. Finally an example was constructed to testify the correctness and validity of the algorithm proposed.