The electrical design drawing of the school canteen on the second floor shows that the automatic fire alarm system of the building is of level II, and a regional alarm is set to control the fire alarm of the building and the linkage control of related equipment. In the dining room, duty room, meeting room, elevator hall, staircase lobby, power distribution room, machine room, walkway and other important places of the canteen on each floor, a sense is set up. Smoke detector, temperature sensing is set in the kitchen