To improve a life quality of elderly residents and others in view of the difficulty of knowing what is in a refrigerator without opening it, especially in a multigenerational household's dining kitchen, where a plurality of persons freely access it, by imaging foodstuff and dishes to be stored in a refrigerator through a digital camera built in a remote control and computerizing the date/time of imaging and an approximate volume determined by image analysis to indicate the condition of food storage in the refrigerator, so that material and food are consumed opportunely, by avoiding food hazards such as food poisoning due to growth of microorganisms and alteration of food components during unnecessary or extended storage.

The condition of food stored in the refrigerator is used in the form of digital information for menu proposal, healthcare and the like by different families of close relatives, caregivers and others who access the Internet instead of opening the refrigerator. Electronic data acquired by the refrigerator remote control and refrigerator is analyzed by a food sensitivity engineering technique in which statistical data mining on how an elderly residents or others, prefer and select food, determines the optimum values of dishes and recipes useful in satisfying the elderly residents or others with daily desire for delicious dishes and preferences to improve its life quality.