  Thanks to its unique capabilities the ALICE experiment can measure the
production of identified particles and resonances over a wide momentum range
both in pp and Pb-Pb collisions at the LHC. In this report,
particle-identification detectors and techniques, as well as achieved
performance, are shortly reviewed. The current results on hadron transverse
momentum spectra measured in pp collisions at $\sqrt{s}$ = 0.9 TeV and 7 TeV,
and in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV are shown. In
particular, proton-proton results on particle production yields, spectral
shapes and particle ratios are presented as a function of the collision energy
and compared to previous experiments and commonly-used Monte Carlo models.
Particle spectra, yields and ratios in Pb-Pb are measured as a function of the
collision centrality and the results are compared with published RHIC data in
Au-Au collisions at $\sqrt{s_{\rm NN}}$ = 0.2 TeV and predictions for the LHC.
