A power control system, comprising: a power instruction apparatus including an environment detection unit configured to acquire environment information of at least one of measured temperature and measured humidity of each of a plurality of living spaces in the household, and a healthcare processing unit configured to acquire measurement data measured by an activity measurement apparatus; a display device configured to display operation information of the power instruction apparatus; and the activity measurement apparatus configured to measure an amount of activity of a user in the household, the display device and the activity measurement apparatus being each communicably connected to the power instruction apparatus via wired or wireless communication, and the display device being configured to display the environment information acquired by the environment detection unit of the power instruction apparatus and the measurement data measured by the activity measurement apparatus, in response to an instruction from a user; the power instruction apparatus is configured to limit total electric power in a household by individually controlling an upper power limit of each of a plurality of home electric appliances in the household, characterized in that, when the power instruction apparatus detects that usage of the activity measurement apparatus is to be started, the power instruction apparatus is configured to cause the display device to display determination result information representing whether or not an environment of a living space in which the activity measurement apparatus is present is suitable for activity. a power instruction apparatus including an environment detection unit configured to acquire environment information of at least one of measured temperature and measured humidity of each of a plurality of living spaces in the household, and a healthcare processing unit configured to acquire measurement data measured by an activity measurement apparatus; a display device configured to display operation information of the power instruction apparatus; and the activity measurement apparatus configured to measure an amount of activity of a user in the household, the display device and the activity measurement apparatus being each communicably connected to the power instruction apparatus via wired or wireless communication, and the display device being configured to display the environment information acquired by the environment detection unit of the power instruction apparatus and the measurement data measured by the activity measurement apparatus, in response to an instruction from a user; the power instruction apparatus is configured to limit total electric power in a household by individually controlling an upper power limit of each of a plurality of home electric appliances in the household, characterized in that, when the power instruction apparatus detects that usage of the activity measurement apparatus is to be started, the power instruction apparatus is configured to cause the display device to display determination result information representing whether or not an environment of a living space in which the activity measurement apparatus is present is suitable for activity.