Abstract: We propose an energy scheduling method of the heliostat field, based on integer programming, to meet the requirements of power generation and to save operation costs in a solar tower power plant. We adopt a greedy-PSO（particle swarm optimization) algorithm to solve the optimization problem. The simulation results show that the heliostat field can export a specified energy value in the case of DNI（direct normal insolation) change, which verifies the effectiveness of the proposed method. Furthermore, the method is applied to the control of a water-steam receiver and simulation results indicate that real-time energy demand can be satisfied with the proposed method.