A　fever　is　a　prevalent　sign　of　numerous　illnesses,　such　as　the　COVID-19　that　ravaged　a　few　years　ago　or　influenza.　The　demand　for　non-contact　body　temperature　measurement　technology　is　increasing　with　the　development　of　technology.　Infrared　thermometers　may　be　a　better　choice　for　screening　body　temperature.　However,　multiple　variables　can　impact　the　thermometer＇s　measuring　accuracy,　such　as　the　measurement　distance,　forehead　contamination,　and　measurement　position.　To　overcome　these　factors,　this　paper　designed　and　constructed　a　digital　infrared　thermometer.　The　thermometer　is　based　on　an　Arduino　board　and　comprises　a　MLX90614　sensor,　a　LCD1602　display　screen,　and　a　MH-　FMG　buzzer　and　so　on.　The　forehead　temperature　of　20　participants　of　different　ages　and　genders　was　measured　using　an　infrared　thermometer　and　the　data　obtained　was　analyzed　by　drawing　a　linear　fitting　function.　The　performance　of　the　final　assembled　thermometer　was　calibrated　and　verified　by　experiments.　The　infrared　thermometer　might　achieve　accurate　forehead　temperature　measurement　within　a　short　distance　(error　less　than　or　equal　to　±0.3°C),　which　could　be　similar　to　the　performance　of　commercial　thermometers.　The　authors　provided　a　simple,　low-cost,　and　efficient　solution　for　the　development　of　non-contact　body　temperature　measurement　technology,　which　could　have　important　significance　and　value　for　preventing　and　controlling　infectious　diseases　caused　by　fever　and　ensuring　public　health　safety.　©　COPYRIGHT　2024　SPIE.　Downloading　of　the　abstract　is　permitted　for　personal　use　only.