The present invention relates to a method of processing frozen food the method comprising the steps of: applying a first thermal power to the frozen food detecting a water phase change of the frozen food and applying a second thermal power to the frozen food when the water phase change of the frozen food is detected. A device based on said method is also proposed. The method detects the water phase in food as the indicator of the thawing process and can detect thawing progress through the change of this indicator. With the proposed method or device the thawing progress of the frozen food can be controlled intelligently and more precisely.
