The present invention relates to a chair having left and right rotating shafts at the lower part and Position detection like a gyro sensor can be combined with a position sensor. A video monitor that is combined with a position sensor and A horizontal support provided to rotate the monitor up and down, an up and down rotation means comprising an up and down rotation shaft and a handle, and It is composed of a support having an up and down rotation shaft. By directly coupling the support to the chair structure itself, the volume of the overall device configuration is minimized and It is characterized in that the chair and the monitor simultaneously rotate left and right, while the monitor rotates up and down by the handle to provide an image of the viewing angle sensed by the position sensor 9 .
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