A method and system for adaptive determination of network slice configuration and resource requirement is disclosed. The method includes creating a service requirement set based on a service request. The method further includes determining enhancements and adjustments to be done in the service requirement set based on a plurality of user entitlements corresponding to the user associated with the service request. The method further includes generating an updated service requirement set based on the enhancements and adjustments applied on the service requirement set. The method further includes determining a network slice template hierarchy based on the updated service requirement set. The method further includes determining a resource requirement corresponding to each of the plurality of network sub-nets based on the updated service requirement set, the plurality of user entitlements, and dynamic network context.