An image forming apparatus capable of receiving a raster image from an image processing controller includes: a transmitting unit transmitting device information of the image forming apparatus to an external device via the image processing controller; a determining unit determining whether the image processing controller is in a first power condition or in a second power condition consuming lower power than the first power condition; and a control unit allowing the transmitting unit to transmit the device information to the external device in a case where the determining unit determines that the image processing controller is in the first power condition, and in a case where the determining unit determines that the image processing controller is in the second power condition, restrict the transmitting unit to transmit the device information to the external device until the image processing controller returns to the first power condition from the second power condition.