The invention provides a household electricity intelligent management system. A sensor is used for monitoring the indoor personnel situation, the temperature, the humidity, light brightness and the like in a real-time mode. According to the acquisition of data like the temperature, whether relevant electric appliances are turned on or not is determined, and the temperature value when the relevant electric appliances run is determined. A working period of each electric appliance can also be set, before each relevant electric appliance is turned on, whether the current time is located in the working period of each electric appliance or not is preferentially judged, and if the current time is not in the working period, the electric appliances can not be turned on. According to the corresponding relation between the set electricity prices and periods, and the corresponding relation between the electricity consumption and the electricity prices, after the electricity consumption of each electric appliance is obtained, the total electricity consumption and the electricity consumption in each period are calculated, whether the total electricity consumption exceeds the preset value or not is judged, if the total electricity consumption exceeds the preset value, a prompt is sent to a user through an alarm module, the user is informed of the current electric consumption and the electric charge situation, and some electric appliances are turned off according to the preset electricity consumption weight of the electric appliances. The household electricity intelligent management system can effectively manage the household electric appliances and save electric energy when used.