The invention discloses a risk forecast method for a household air conditioner and a household refrigerator. The method comprises the following steps that (1), a home wireless sensor network is established, namely, the zigbee technology is adopted indoors, and the home wireless sensor network is formed by a digital home server which is taken as the center, an air conditioner measuring socket, a temperature and humidity sensor, the refrigerator, a refrigerator measuring socket and a refrigerator freezing chamber temperature sensor; (2), the digital home server uploads power and temperature and humidity data measured by the measuring sockets and the temperature and humidity sensor into a home appliance risk forecast system server, and the home appliance risk forecast system server conducts calculation and analysis based on the uploaded data. The risk forecast method for the household air conditioner and the household refrigerator has the advantages that potential faults existing in the air conditioner can be found as soon as possible when the working state of the household air conditioner is detected, fault risk reminding and expert advices or maintenance data are supplied to users, so that the air conditioner is maintained as soon as possible, and more serious undesirable effects are avoided.