Abstract: Disclosed is a method of monitoring food quality including (a) receiving an environmental factor value sensed during transporting by a moving sensor tag attached to a container or palette on which a plurality of food is stacked, a time value sensing the environmental factor, and food information from a distribution company server; (b) receiving an environmental factor value sensed by a fixed sale sensor tag which matches the food information stored in the moving sensor tag, a time value sensing the environmental factor, and food information from the distribution company server; (c) measuring a current quality index for each individual quality analysis item and a total quality index based on the food information sensed by the moving sensor tag and the fixed sale sensor tag, the environmental factor values, and the time values sensing the environmental factors; (d) setting price of the food based on the measured quality index for each individual quality analysis item and total quality index; and (e) transmittin