The utility model provides a smart home systems based on bluetooth. It chooses for use STC12C5A60S2 to be main control chip, detect indoor environment parameter with temperature and humidity sensor and smoke transducer, carry out the comparison with of survey environmental parameter with the settlement parameter, if the institute environmental parameter that surveys not in the settlement in the environmental parameter, the relay of being connected with external equipment produces the response, it chooses for use bluetooth to be human -computer interaction's radio communication technique, communicate its and smart mobile phone, can be through the relay that bluetooth of the mobile phone assistant controlled and external equipment is connected, and can look over environmental parameter through bluetooth of the mobile phone assistant.