A heterogeneous network energy saving method, comprising: acquiring, by a network control device, load information of all cells of a first access network device (step 10); determining, by the network control device, a to-be-closed cell according to the load information of all the cells, and determining at least one second access network device according to the to-be-closed cell (step 20), migrating a service in the to-be-closed cell to the at least one second access network device (step 20), and closing the to-be-closed cell, wherein the to-be-closed cell is within a network coverage area formed by the at least one second access network device (step 20), characterized in that the acquiring, by the network control device, load information of all cells of the first access network device comprises: sending, by the network control device, a second load information acquiring request to the first access network device, and receiving the load information of all the cells that is returned by the first access network device, that after the closing, by the network control device, the to-be-closed cell, the method further comprises: receiving, by the network control device, a first wake-up request that is sent by one second access network device of the at least one second access network device (step 40); and selecting, by the network control device, a to-be-waked-up cell from closed cells of the first access network device by determining a closed cell that has a same coverage area as the cell of the second access network device and that is of the first access network device as the to-be-waked-up cell and sending a second wake-up request to the first access network device, wherein the second wake-up request carries an identifier that is used to indicate the to-be-waked-up cell, so that the first access network device enables a radio frequency module corresponding to the to-be-waked-up cell (step 50). acquiring, by a network control device, load information of all cells of a first access network device (step 10); determining, by the network control device, a to-be-closed cell according to the load information of all the cells, and determining at least one second access network device according to the to-be-closed cell (step 20), migrating a service in the to-be-closed cell to the at least one second access network device (step 20), and closing the to-be-closed cell, wherein the to-be-closed cell is within a network coverage area formed by the at least one second access network device (step 20), characterized in that the acquiring, by the network control device, load information of all cells of the first access network device comprises: sending, by the network control device, a second load information acquiring request to the first access network device, and receiving the load information of all the cells that is returned by the first access network device, that after the closing, by the network control device, the to-be-closed cell, the method further comprises: receiving, by the network control device, a first wake-up request that is sent by one second access network device of the at least one second access network device (step 40); and selecting, by the network control device, a to-be-waked-up cell from closed cells of the first access network device by determining a closed cell that has a same coverage area as the cell of the second access network device and that is of the first access network device as the to-be-waked-up cell and sending a second wake-up request to the first access network device, wherein the second wake-up request carries an identifier that is used to indicate the to-be-waked-up cell, so that the first access network device enables a radio frequency module corresponding to the to-be-waked-up cell (step 50). sending, by the network control device, a second load information acquiring request to the first access network device, and receiving the load information of all the cells that is returned by the first access network device, that after the closing, by the network control device, the to-be-closed cell, the method further comprises: receiving, by the network control device, a first wake-up request that is sent by one second access network device of the at least one second access network device (step 40); and selecting, by the network control device, a to-be-waked-up cell from closed cells of the first access network device by determining a closed cell that has a same coverage area as the cell of the second access network device and that is of the first access network device as the to-be-waked-up cell and sending a second wake-up request to the first access network device, wherein the second wake-up request carries an identifier that is used to indicate the to-be-waked-up cell, so that the first access network device enables a radio frequency module corresponding to the to-be-waked-up cell (step 50). receiving, by the network control device, a first wake-up request that is sent by one second access network device of the at least one second access network device (step 40); and selecting, by the network control device, a to-be-waked-up cell from closed cells of the first access network device by determining a closed cell that has a same coverage area as the cell of the second access network device and that is of the first access network device as the to-be-waked-up cell and sending a second wake-up request to the first access network device, wherein the second wake-up request carries an identifier that is used to indicate the to-be-waked-up cell, so that the first access network device enables a radio frequency module corresponding to the to-be-waked-up cell (step 50).