A network function management method, wherein the method comprises: receiving, by a first management unit (700, 800), sharing information of a network function from a second management unit (900, 1000), wherein the sharing information of the network function is used to indicate whether the network function can be shared by at least two network slices; and orchestrating, by the first management unit (700, 800), the network function based on the sharing information of the network function, wherein before the receiving, by the first management unit (700, 800), the sharing information of the network function from the second management unit (900, 1000), the method further comprises: sending, by the first management unit (700, 800), a network function instantiation request message to the second management unit (900, 1000); and the receiving, by the first management unit (700, 800), sharing information of the network function from a second management unit (900, 1000) comprises: receiving, by the first management unit (700, 800), a network function instantiation response message from the second management unit (900, 1000), wherein the network function instantiation response message carries the sharing information of the network function, wherein the sharing information of the network function comprises key performance indicator, KPI, information of the network function. receiving, by a first management unit (700, 800), sharing information of a network function from a second management unit (900, 1000), wherein the sharing information of the network function is used to indicate whether the network function can be shared by at least two network slices; and orchestrating, by the first management unit (700, 800), the network function based on the sharing information of the network function, wherein before the receiving, by the first management unit (700, 800), the sharing information of the network function from the second management unit (900, 1000), the method further comprises: sending, by the first management unit (700, 800), a network function instantiation request message to the second management unit (900, 1000); and the receiving, by the first management unit (700, 800), sharing information of the network function from a second management unit (900, 1000) comprises: receiving, by the first management unit (700, 800), a network function instantiation response message from the second management unit (900, 1000), wherein the network function instantiation response message carries the sharing information of the network function, wherein the sharing information of the network function comprises key performance indicator, KPI, information of the network function. sending, by the first management unit (700, 800), a network function instantiation request message to the second management unit (900, 1000); and the receiving, by the first management unit (700, 800), sharing information of the network function from a second management unit (900, 1000) comprises: receiving, by the first management unit (700, 800), a network function instantiation response message from the second management unit (900, 1000), wherein the network function instantiation response message carries the sharing information of the network function, wherein the sharing information of the network function comprises key performance indicator, KPI, information of the network function. receiving, by the first management unit (700, 800), a network function instantiation response message from the second management unit (900, 1000), wherein the network function instantiation response message carries the sharing information of the network function, wherein the sharing information of the network function comprises key performance indicator, KPI, information of the network function.