A power supply control device including: traffic information acquisition means for acquiring traffic information for roads in the vicinity of the charging station; and control means for controlling an amount of power which is to be supplied to the charging station based on the traffic information (particularly, a traffic flow of vehicles having possibility of using the charging station) acquired by the traffic information acquisition means. An information provision device including: charging station information acquisition means for acquiring information on charging stations; traffic-flow acquisition means for acquiring a traffic flow of vehicles using external electrical energy in the vicinity of each charging station on which the information is acquired by the charging station information acquisition means; and charging station determination means for determining a charging station on which the information is to be provided among the charging station based on the traffic flow acquired by the traffic-flow acquisition means.