The present invention relates to a ubiquitous sensor network-based system and method for automatically managing food sanitation. The system includes at least one sensor node (100) configured to measure and store sensing information, compare measured values with preset values, and generate a warning message. A sink node (200) mediates between the sensor node and a management server (400) and between the mobile terminal and the management server. A mobile terminal (300) reads food information using an RFID reader or a barcode reader, transmits the food information, measures and stores sensing information, compares the measured values with preset values, and generates a warning message. The management server (400) generates a control command, transmits the control command to the sensor node or the mobile terminal, and notifies a manager of an urgent situation and a location of the kitchen appliance if received data is a warning message.