A system for roasting particulate material, such as coffee or cacao beans, grains, malt, said system comprising: a concentrated solar collector configured for heating a fluid； a heat storage device configured for storing heat of the heated fluid； a particulate material roasting device comprising a treatment compartment configured for receiving the particulate material, at least one generation unit configured for generating at least one gas and/or steam flow with a controlled temperature, through said treatment compartment； said at least one generation unit being configured for exchanging heat between said at least one gas and/or steam flow and a second flow； a circulation system configured for generating the second flow by using heat stored in the storage device, and optionally configured for using directly the heated fluid.
