smart board 400 series.With the rapid growth of the electronic whiteboard in a few years and the decline in the profit of the projector's own products, the projector manufacturers have been eager to develop new products to cope with the "big cake" of the electronic whiteboard. After several years of precipitation, the projection manufacturers explored and utilized the 3D stereoscopic teaching effect and ??joined??, and the 3D interactive teaching program was applied in the competition. As we all know, 3D is becoming a teaching trend, and with the perfect combination of interactive projection functions, it will become a major trend in the future classroom teaching. The emergence of this new technology will bring a big impact to the electronic whiteboard, and as the technology continues to mature, who is ups and downs? Interactive whiteboard and 3D interactive projections are bound to have a decisive battle of "you die"!