The LHCb calorimeter system is composed of four subdetectors. In addition to the electromagnetic and hadronic calorimeters (ECAL and HCAL respectively), the system includes in front of them the Scintillating Pad Detector (SPD) and Pre-Shower (PS), which are two planes of scintillating pads separated by a 2.5 radiation length lead sheet, aimed at tagging the electric charge and the electromagnetic nature of the calorimeter clusters for the first level of trigger. During 2010 operation, hadronic, leptonic and photon triggers of particular interest for hadronic B decays and radiative decays was given by the calorimeter system. The design and construction characteristics of the LHCb calorimeter will be recalled. Strategies for monitoring and calibration during data taking will be detailed in all aspects. The performances achieved will be illustrated by selected channels of interest for the B physics.