A study on the effects of cold storage conditions applying the Hyokan technology on the quality and postharvest losses of oranges was conducted for the preservation of Valencia 2 oranges at the laboratory of Institute of Regional Research and Development. Oranges were harvested with 80% fruit ripening. After preliminary processing, they were preserved by two formulations: (1) the control preserved by Sanky refrigerator at temperature 2-4o C; (2) the studied ones preserved cold by the Hyokan technology at 2o C and 3,500 V. After 4 months of the storage, oranges preserved by the refrigerator often had a deterioration in quality, especially in terms of weight loss and sensory quality. Oranges preserved with the Hyokan technology reduced the weight loss, keeped freshness, flavour, peel colour and good nutritional quality. Therefore, the Hyokan technology has been considered a promising new technology in the long-term preservation of oranges.