A system and a method for managing and trading fresh foods according to a flavor thereof, comprising a plurality of fresh foods, an image capturing module, a processing module and a classification module. The fresh food is attached with a product label including a code and a colorimetric transducer array that comprises at least one sensing material for sensing the fresh food. The sensing material undergoes a chemical reaction with at least one metabolic molecule of the fresh food to change the sensing material from an initial color to an indication color. The image capturing module captures an image comprising an appearance of the fresh food, the code and the indication color. The processing module provides a real-time information according to a comparison result between the image and a database. The classification module receives the real-time information and classifies the fresh food according to the real-time information.