A latch mechanism includes at least one pin disposed on a monitor for inserting in a hole on a host, at least one first rod disposed inside the host, at least one second rod disposed inside the host, a pushing component disposed inside the host, and a first elastic component disposed inside the host and connected to the pushing component for providing elastic force to the pushing component. A first end of the first rod is for fixing the pin. A first end of the second rod is connected to a second end of the first rod. The pushing component is connected to a second end of the second rod for pushing the second rod so as to drive the first rod and the second rod to rotate on a plane where the pushing component is pushed so that the first end of the first rod separates from the pin.