A data transfer control system that controls data transfer between a first electronic apparatus connected via a first bus and a device connected via a second bus, including: a management section that conducts a process of receiving a login request when a login request for acquirement of a right to access to the device comes from the first electronic apparatus and that conducts a process of receiving a logout request when a logout request for abandonment of the access right acquired upon receipt of the login request comes from the first electronic apparatus; and a power control section that conducts power control by turning on power supply to the device when the login request to the device comes from the first electronic apparatus.