Disclosed are a humidifier and a household appliance. The humidifier includes a housing, a fan, a water absorption net assembly and a time record assembly. The housing is provided with an air inlet and an air outlet, an air duct communicating with the air inlet and the air outlet, and a water storage tank communicating with the air duct are formed inside the housing. The fan is provided in the air duct. The water absorption net assembly is at least partially extending into the water storage tank and at least partially extending into the air duct. The time record assembly is installed in the housing and configured to record a use time of the water absorption net assembly.