Formaldehyde is one of main pollutions in indoor air. Along with people’s increasing attentions on indoor air pollutions,accurate and rapid formaldehyde determination looks much more important. At present,the most rapid formaldehyde determination is the method with sensor. Therefore, features of those formaldehyde gas sensors such as electrochemical sensors, chemiluminescence sensors, metal oxide sensors, electronic noses and surface acoustic wave sensors were emphatically described and investigated based o...