The invention provides a server energy consumption control method and system. The method comprises that an initialized relation model of server performance parameters and server energy consumption parameters is established according to characteristic parameters of server operation performance and energy consumption; server operation baseline data are established according to server operation historical data characteristic parameters; an energy consumption control strategy of a server is generated according to the initialized relation model and the operation baseline data so that an energy consumption scheduling control request is triggered; and the energy consumption control strategy is dynamically adjusted according to real-time performance data of the server. Compared with methods in the prior art, a non-energy-consumption control problem is considered from the perspective of server load, and server energy consumption can be dynamically adjusted so that control is simple and convenient and adjustment is stable and rapid.