Disclosed is an online crane game apparatus. The crane game apparatus includes: a body accommodated therein with prizes; a camera for photographing an inside of the body to generate a game play image; a screen unit provided on at least one surface of the body and having a single color; a communication unit for synthesizing a background video or image to an area corresponding to the screen unit in the game play image to transmit the synthesized background video or image to an outside; and a control unit for controlling the communication unit. Accordingly, the user plays the game while watching the game play image that is more exciting, so that a dynamic and realistic game is implemented.