A method for managing resources of a network slice, comprising: obtaining, by a slice management module, independent decision results of a plurality of network slices respectively, wherein the independent decision result comprises scale-out, scale-in, or keeping a quantity of instances unchanged; if the independent decision results of the plurality of network slices are not completely consistent, determining, by the slice management module, final decision results for the network slices based on the independent decision results of the plurality of network slices; and sending, by the slice management module, the final decision results to a virtualized infrastructure manager, VIM (109, 508), wherein the final decision results are used to instruct to allocate resource of a first network slice in the plurality of network slices to a second network slice in the plurality of network slices, and an independent decision result of the first network slice is scale-in, and an independent decision result of the second network slice is keeping a quantity of instances unchanged or scale-out; or an independent decision result of the first network slice is keeping a quantity of instances unchanged, and an independent decision result of the second network slice is scale-out, wherein before the obtaining, by a slice management module, independent decision results of a plurality of network slices respectively, the method further comprises: receiving, by the slice management module, a request for instructing to create a network slice template, wherein the network slice template comprises a resource orchestration ratio parameter, and the resource orchestration ratio parameter is a maximum resource ratio of network slice instances allowed to be shared; creating, by the slice management module, the network slice template based on the request; and creating, by the slice management module based on the network slice template, network slice instances comprised in the first network slice. obtaining, by a slice management module, independent decision results of a plurality of network slices respectively, wherein the independent decision result comprises scale-out, scale-in, or keeping a quantity of instances unchanged; if the independent decision results of the plurality of network slices are not completely consistent, determining, by the slice management module, final decision results for the network slices based on the independent decision results of the plurality of network slices; and sending, by the slice management module, the final decision results to a virtualized infrastructure manager, VIM (109, 508), wherein the final decision results are used to instruct to allocate resource of a first network slice in the plurality of network slices to a second network slice in the plurality of network slices, and an independent decision result of the first network slice is scale-in, and an independent decision result of the second network slice is keeping a quantity of instances unchanged or scale-out; or an independent decision result of the first network slice is keeping a quantity of instances unchanged, and an independent decision result of the second network slice is scale-out, wherein before the obtaining, by a slice management module, independent decision results of a plurality of network slices respectively, the method further comprises: receiving, by the slice management module, a request for instructing to create a network slice template, wherein the network slice template comprises a resource orchestration ratio parameter, and the resource orchestration ratio parameter is a maximum resource ratio of network slice instances allowed to be shared; creating, by the slice management module, the network slice template based on the request; and creating, by the slice management module based on the network slice template, network slice instances comprised in the first network slice. receiving, by the slice management module, a request for instructing to create a network slice template, wherein the network slice template comprises a resource orchestration ratio parameter, and the resource orchestration ratio parameter is a maximum resource ratio of network slice instances allowed to be shared; creating, by the slice management module, the network slice template based on the request; and creating, by the slice management module based on the network slice template, network slice instances comprised in the first network slice.