Disclosed is a method of controlling a horizontal screen or a vertical screen of a television. The method includes the following operations of: acquiring a mode of a television, and judging whether the mode is a mobile phone mode; in response that the television is in the mobile phone mode, acquiring an image to be displayed, and playing the image in the vertical screen according to a vertical state of the image. The disclosure further discloses a device of controlling a horizontal screen or a vertical screens of a television, and a computer readable storage medium.