Image forming apparatus, and control method thereof

An image forming apparatus (1) operates in a first power mode and a second power mode. The image forming apparatus (1) includes a communication means configured to communicate with an external apparatus, a control means (10) configured to be communicably connected to the communication means to process data transmitted from the communication means, and a power control means (10) configured to control power supply to the communication means. While the image forming apparatus (1) is in the first power mode where power is supplied to the control means (10) and the communication means, the control means (10) determines whether to shift the image forming apparatus (1) to the second power mode, based on a communication state between the communication means and the external apparatus. The power control means (10) performs control to stop power supply to the communication means based on the determination made by the control means (10), and shifts the image forming apparatus (1) to the second power mode.