A display device is capable of switching between image sources and includes a first transmission interface, a second transmission interface, a first peripheral interface, a system on chip (SOC) and a display panel. The first transmission interface is configured to be coupled to a first electronic device and receive a first image signal from the first electronic device. The second transmission interface is configured to be coupled to a second electronic device and receive a second image signal from the second electronic device. The first peripheral interface is configured to be coupled to a first peripheral device providing input information. The SOC selects at least one of the first and second image signals according to the input information to generate a display signal. The display panel displays an image according to the display signal.