The invention discloses a mouth mask type device for monitoring mouth and nose airflow of an animal. The device comprises a fastening belt for preventing the mouth mask type device from falling off the mouth and nose of an animal, wherein the fastening belt is connected with a mouth mask capable of covering the nasal cavity and the mouth cavity of the animal; the mouth mask is provided with an interface of a thermo-sensitive airflow sensing chip for monitoring the mouth and nose airflow of the animal; and the thermo-sensitive airflow sensing chip can be placed in the mouth mask. The mouth mask type device has the advantages of simple structure, low cost, low probability of falling and capabilities of preventing the animal from biting and hurting people and damaging monitoring equipment and effectively monitoring the mouth and nose airflow of the animal under normal physiological and pathological states.