Method for detecting whether temperature abnormal materials are placed in refrigerator or not

The invention provides a method for detecting whether temperature abnormal materials are placed in a refrigerator or not. The refrigerator comprises a refrigerator body internally divided into a plurality of storage spaces, a door body arranged at the front of the refrigerator body and a plurality of infrared sensors for sensing temperatures of the multiple storage spaces correspondingly. The method includes the steps that after the door body is opened, the multiple infrared sensors are controlled to collect temperature values; whether an temperature value collected by any one of the infrared sensors generates sudden change or not is judged; if yes, a first temperature change value obtained before and after the temperature abnormal materials are possibly placed into the abnormal storage space corresponding to the infrared sensor and a second temperature change value caused by heat exchange between the outer environment and the abnormal storage space before and after the temperature abnormal materials are poss