A method of controlling an on-screen display (OSD) protocol in a device includes: receiving analysis data of a video image from an apparatus capable of at least one of wired and wireless communication; displaying the video image and analysis data of the video image on a display of the device; determining whether to record the analysis data of the video image in a persistent storage device to be retained after the device reboots or in a temporary storage device to be erased after the device reboots; and storing the analysis data of the video image in one of the persistent storage device and the temporary storage device according to the determination.