The electronic whiteboard can extend the writing space indefinitely. The electronic whiteboard software of Triumph Electronic Whiteboard can make the writing space infinite. The interactive electronic whiteboard is fully combined with the short-focus projection to form a multimedia teaching system, which is more convenient when used with the interactive electronic whiteboard. Due to the ultra-short focus function of the projector, the projector is installed closer to the whiteboard, and the user will not block the projection optical path during use, making the presentation more complete and the communication more smooth.