Server, system, and management method

Provided are a server, a system, and a management method. The server is provided with a communication unit that acquires information relating to a power supply/demand adjustment request, and one or more processors that control power control in a reservation column in which power control has been reserved by a user of an electric vehicle. The processor performs control to confirm, to a user, whether or not the power control corresponding to the power supply/demand adjustment request can be executed after the reservation column during a period from the start of the power control to the end of the power control in the reservation column. 一种服务器、系统、以及管理方法，服务器具备取得与电力供求调整请求相关的信息的通信部、和对由电动车辆的用户预约了电力控制的预约栏中的电力控制进行控制的一个或多个处理器。处理器在所述预约栏中的从所述电力控制的开始时到所述电力控制刚结束后为止的期间，进行将能否在预约栏后执行与上述电力供求调整请求相应的电力控制向用户确认的控制。