The invention relates to the technical field of machinery and electronics, and provides a rotatable double-sided electronic board. The rotatable double-sided electronic board comprises a support plateprovided with a cavity, the front side of the support plate is provided with a display, the back side of the support plate is provided with a writing pad, a control module is arranged in the cavity of the support plate and comprises a memorizer, a power module and a switch unit, wherein the memorizer, the power module and the switch unit are connected with a single chip microcomputer, and the display is connected with the single chip microcomputer of the control module; and the support plate is provided with a round hole, and a rotating rod penetrates through the round hole and is fixed to the support plate by two clamping valves. The invention further provides an electronic bulletin board. Through arrangement of the display on the front side of the support plate and the writing pad on the back side of the support plate, the electronic board not only can meet a demand of handwriting, but also meet a demand of electronic displaying; through the rotating rod, the support plate can rotate around the rotating rod, not only the writing pad, but also the display can face towards a reader, so that the reader can conduct convenient writing, pasting or reading of electronic information, etc.