A network planning method, wherein the method comprises: acquiring information about network planning services of multiple phases, wherein the information comprises a bandwidth of each service of each phase and wherein services whose configured times are the same are classified into a same phase; grouping the network planning services of the multiple phases according to pre-configured grouping information, wherein the pre-configured grouping information comprises information about a group to which a service of each phase belongs, and the services of the same phase belong to one group; performing first-time network traffic grooming planning on each group of network planning services after grouping; and grouping remaining network planning services after grooming planning of each group into another group, and performing second-time grooming planning on the remaining network planning services in the another group according to a preset optimization direction, to obtain routing information of the services of each phase and information about optical channels OCHs of the network planning services of the multiple phases, characterized in that the preset optimization direction is that a remaining network planning service of an earlier phase cannot be placed in an OCH established for a network planning service of a later phase, and that the performing first-time grooming planning on each group of network planning services after grouping comprises: in a case in which a group of network planning services are services of a same phase, performing grooming planning on the services in the same group; and in a case in which a group of network planning services are services of different phases, performing grooming planning on services of a same phase separately. acquiring information about network planning services of multiple phases, wherein the information comprises a bandwidth of each service of each phase and wherein services whose configured times are the same are classified into a same phase; grouping the network planning services of the multiple phases according to pre-configured grouping information, wherein the pre-configured grouping information comprises information about a group to which a service of each phase belongs, and the services of the same phase belong to one group; performing first-time network traffic grooming planning on each group of network planning services after grouping; and grouping remaining network planning services after grooming planning of each group into another group, and performing second-time grooming planning on the remaining network planning services in the another group according to a preset optimization direction, to obtain routing information of the services of each phase and information about optical channels OCHs of the network planning services of the multiple phases, characterized in that the preset optimization direction is that a remaining network planning service of an earlier phase cannot be placed in an OCH established for a network planning service of a later phase, and that the performing first-time grooming planning on each group of network planning services after grouping comprises: in a case in which a group of network planning services are services of a same phase, performing grooming planning on the services in the same group; and in a case in which a group of network planning services are services of different phases, performing grooming planning on services of a same phase separately. in a case in which a group of network planning services are services of a same phase, performing grooming planning on the services in the same group; and in a case in which a group of network planning services are services of different phases, performing grooming planning on services of a same phase separately.