Commissioning method and commissioning system

A commissioning system for a HVAC system, the HVAC system comprising a controller, a HVAC component, an actuator associated with the HVAC component and a sensing component for detecting the HVAC component, wherein the commissioning system comprises:

• a test work condition unit configured to establish a commissioning mission and send the commissioning mission to the controller;
• a digital twin system comprising a digital component, a digital actuator and a digital sensing component corresponding to the HVAC component, the actuator and the sensing component, wherein the digital twin system is corresponding to the HVAC system and receives the commissioning mission from the controller with the HVAC system;
• and,
• a diagnostic engine configured to receive physical data from the HVAC system and digital data from the digital twin system and produce a diagnosis result based on the physical data and the digital data.