The absorption and emission spectra of Ga-La-S:O doped with Pr³⁺, and Ga-Ge-As-S chalcogenide glasses doped with Pr³⁺, Dy³⁺, Nd³⁺, Sm³⁺ and Ho³⁺ were experimentally investigated at room temperature and at T=4 K. Photoluminescence spectra were measured at low temperature (T=4 K) at excitation by He-Ne (λ=632.8 nm line) and Ar ion (INNOVA 306, λ=514.5 nm line) lasers working in CW regime, in order to observe simultaneously the narrow 4f-4f emission from rare-earth ions and the broad band luminescence of the host glass. In the transmission spectra of rare-earth doped glasses differs from that of the base glass. The major feature in low-temperature of photoluminescence spectra (PL) is the presence of the broad band luminescence of the host glass and relatively sharp 4f-4f radiative transitions due to the presence of rare-earth (RE³⁺) ions, that gives the direct evidence of the energy transfer between the host glass and respective RE³⁺ dopants.