Аннотация:The capabilities of the CMS experiment to study properties of hot and dense QCD-matter created in heavy ion collisions at the CERN Large Hadron Collider with the perturbative processes (so-called 'hard probes') are presented. Detailed studies from complete simulations of the CMS detectors in Pb+Pb collisions at $\sqrt{s}=5.5$ TeV per nucleon pair are presented in view of two hard probes: quarkonium and $\gamma$-jet production.