As susceptible population of flu and influenza, teenagers and poorly resistant patients tend to be concentrated in schools and hospitals, and dense populations are more likely to cause the widespread transmission of flu and influenza. Setting up a body temperature detection system at the entrance of schools and hospitals can quickly detect and isolate patients suspected of having fever and prevent the spread of the disease. Peiport BS system can find fever patients, display on the screen and generate alarm to inform the staff that a fever patient appears.