Coffee beans roasting system comprising : - a coffee beans roasting apparatus , said apparatus comprising : . a chamber dedicated to roasting of coffee beans, . a heating device to supply a flow of hot air to the chamber, . at least one first temperature probe to regulate the temperature of air supplied by the heating device, said first temperature probe being positioned outside the chamber, . a control system configured to control the heating device and configured to reproduce roasting curves each of said roasting curves providing a set of points (T @ti ; ti) representing the temperature to be applied at discrete successive times t i , respectively, said control of the heating device being based on the temperature Treg regulated by the at least one first temperature probe, characterised in that it further comprises: - at least one second temperature probe configured to be introduced temporary inside the roasting apparatus to measure the temperature inside the roasting chamber, and - at least one means configured to create a pressure loss of the flow of hot air while the chamber is void of coffee beans in order to simulate the presence of coffee beans inside the chamber during a roasting operation. - a coffee beans roasting apparatus , said apparatus comprising : . a chamber dedicated to roasting of coffee beans, . a heating device to supply a flow of hot air to the chamber, . at least one first temperature probe to regulate the temperature of air supplied by the heating device, said first temperature probe being positioned outside the chamber, . a control system configured to control the heating device and configured to reproduce roasting curves each of said roasting curves providing a set of points (T @ti ; ti) representing the temperature to be applied at discrete successive times t i , respectively, said control of the heating device being based on the temperature Treg regulated by the at least one first temperature probe, characterised in that it further comprises: - at least one second temperature probe configured to be introduced temporary inside the roasting apparatus to measure the temperature inside the roasting chamber, and - at least one means configured to create a pressure loss of the flow of hot air while the chamber is void of coffee beans in order to simulate the presence of coffee beans inside the chamber during a roasting operation. . a chamber dedicated to roasting of coffee beans, . a heating device to supply a flow of hot air to the chamber, . at least one first temperature probe to regulate the temperature of air supplied by the heating device, said first temperature probe being positioned outside the chamber, . a control system configured to control the heating device and configured to reproduce roasting curves each of said roasting curves providing a set of points (T @ti ; ti) representing the temperature to be applied at discrete successive times t i , respectively, said control of the heating device being based on the temperature Treg regulated by the at least one first temperature probe, characterised in that it further comprises: - at least one second temperature probe configured to be introduced temporary inside the roasting apparatus to measure the temperature inside the roasting chamber, and - at least one means configured to create a pressure loss of the flow of hot air while the chamber is void of coffee beans in order to simulate the presence of coffee beans inside the chamber during a roasting operation. - at least one second temperature probe configured to be introduced temporary inside the roasting apparatus to measure the temperature inside the roasting chamber, and - at least one means configured to create a pressure loss of the flow of hot air while the chamber is void of coffee beans in order to simulate the presence of coffee beans inside the chamber during a roasting operation. <EOS>