The present invention provides an energy-saving control method for a cell in a heterogeneous system, including: receiving, by an access control device of a serving cell, a service request of a multi-mode user equipment UE; and when a radio resource of the serving cell cannot satisfy the service request of the multi-mode UE, if the access control device of the serving cell determines that a heterogeneous-system neighboring cell of the serving cell is in an energy-saving state, sending, by the access control device of the serving cell, an exit energy-saving state request message to an access control device of the heterogeneous-system neighboring cell, where the exit energy-saving state request message is used to request the heterogeneous-system neighboring cell to exit the energy-saving state. The technical solution implements energy-saving control for a cell in a heterogeneous system.