~Abstract:Tallbuildingsare'two-sides'swordinurbanconstruction.Theydohavepartiallysolvedsomeurbanproblemsononeside,butontheothersidetheyhavebroughtsomenega-tiveinfluencesonurbanformsandurbanhabitat.Themostthoroughwayofassessingthecostversusbenefits(social,environment,economic,etc.)ofatallbuildingprojectortallbuildingpolicyisthetrade-offapproach,whichcande-creasethenegativeinfluencesbecauseofthewrongplanningdecisionconcerningtallbuildings.Keywords:Trade-offapproach;tallbuilding;decision-makingmatrix