Abstract: An apparatus and a method for generating a descriptor for a network slice are provided. The apparatus includes a transceiver, a memory storing one or more instructions, and at least one processor configured to execute the one or more instructions stored in the memory to obtain requirements for a network slice, determine at least one of a plurality of network slice templates (NSTs), a plurality of network slice descriptors (NSLDs), or a plurality of network slice instances (NSIs), based on the obtained requirements, when at least one of the plurality of NSTs is determined, determine at least one specific node to substitute for a plurality of abstract nodes included in the at least one of the plurality of NSTs, based on the obtained requirements, and generate a descriptor for a network slice, based on the determined at least one specific node.