A lifting sling system for connecting various loads to a lifting hook of a lifting apparatus, comprising - a head-link, - a set of lifting sling units each consisting of a number of inseparable parts including a coupling member, to be coupled to said lifting hook by means of said head-link, at least one and at most two sling legs, and a connector at the end of each sling leg, said lifting sling units being combinable and adapted for selective coupling of a particular load to said lifting hook in accordance with information provided on an information carrier being attached to the head-link of the lifting sling system, there being a limited number of permissible sling unit combinations, including one or more lifting sling units having altogether at least one sling leg and at most four sling legs, - whereby the load range and the maximum lifting capacity of the lifting apparatus can be fully utilized, irrespective of the particular weights and configurations of the various possible loads characterized in that - said limited number of permissible sling unit combinations includes sling units having at least two different sling leg dimensions (n, n + 1, etc.) and comprises - at least two permissible sling unit combinations having the same number of sling legs (1-leg, 2-leg) but different sling leg dimensions and substantially different work load limits, so as to enable adaptation to a wide range of possible working loads, and also - at least two permissible sling unit combinations having substantially the same work load limit but different numbers of sling legs (1-leg, 2-leg, 3-leg, 4-leg) and different sling leg dimensions (n, n + 1, etc.), so as to enable adaptation to different loads of similar weight but each requiring a specific number of sling legs (1-leg, 2-leg, 3-leg or 4-leg). - a head-link, - a set of lifting sling units each consisting of a number of inseparable parts including a coupling member, to be coupled to said lifting hook by means of said head-link, at least one and at most two sling legs, and a connector at the end of each sling leg, said lifting sling units being combinable and adapted for selective coupling of a particular load to said lifting hook in accordance with information provided on an information carrier being attached to the head-link of the lifting sling system, there being a limited number of permissible sling unit combinations, including one or more lifting sling units having altogether at least one sling leg and at most four sling legs, - whereby the load range and the maximum lifting capacity of the lifting apparatus can be fully utilized, irrespective of the particular weights and configurations of the various possible loads characterized in that - said limited number of permissible sling unit combinations includes sling units having at least two different sling leg dimensions (n, n + 1, etc.) and comprises - at least two permissible sling unit combinations having the same number of sling legs (1-leg, 2-leg) but different sling leg dimensions and substantially different work load limits, so as to enable adaptation to a wide range of possible working loads, and also - at least two permissible sling unit combinations having substantially the same work load limit but different numbers of sling legs (1-leg, 2-leg, 3-leg, 4-leg) and different sling leg dimensions (n, n + 1, etc.), so as to enable adaptation to different loads of similar weight but each requiring a specific number of sling legs (1-leg, 2-leg, 3-leg or 4-leg).